ClassyFire: Listing 4825 chemical categories

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Name	ChemOnt ID	Description
C-cinnamoyl glycosides	CHEMONTID:0003478	C-glycoside derivatives of cinnamic acid. Cinnamic acid is an aromatic compound containing a benzene and a carboxylic acid group forming 3-phenylprop-2-enoic acid.
C-glucuronides	CHEMONTID:0002815	Glucuronides in which the aglycone is linked to the carbohydrate unit through a C-glycosidic bond.
C-glycosyl compounds	CHEMONTID:0002204	Glycoside in which a sugar group is bonded through one carbon to another group via a C-glycosidic bond.
C-nitro compounds	CHEMONTID:0004117	Compounds having the nitro group, -NO2 (free valence on nitrogen), which is attached to carbon.
C-nitroso compounds	CHEMONTID:0003034	Nitroso compounds with he general formula RN=O, where R is an organic group.
C-type proanthocyanidins	CHEMONTID:0004829	Proanthocyanidins, which are characterized by the presence of three or more flavonoid units linked to each other by exactly 4->8 interflavonoid CC-bonds.
C19-gibberellin 6-carboxylic acids	CHEMONTID:0004013	C19-gibberellins with a carboxyl group at the 6-position.
C19-gibberellins	CHEMONTID:0002998	Gibberellins containing 19 carbon atoms, with the COOH group in position 7. In nearly all C19-gibberellins, the carboxyl group at C-4 forms a lactone ring at C-10, a configuration which arises in connection with the loss of the extra C-20 atom.
C2-aryl pyrrolo[2,1-c][1,4]benzodiazepines	CHEMONTID:0004231	Heterocyclic aromatic compounds containing a 2-aryl substituted 1,4-benzodiazepine ring system that is fused to, and shared a nitrogen atom with a pyrrole ring.
C2-linked imidazole ribonucleosides and ribonucleotides	CHEMONTID:0003735	Nucleoside and nucleotide analogues with a structure that consists of an imidazole ring system which is substituted at the C2-position with a ribose moiety. Nucleotide analogues contain a phosphate group linked to the C5 carbon atom of the furanose.
C20-gibberellin 20-carboxylic acids	CHEMONTID:0004015	C20-gibberellins with a carboxyl group at the 20-position.
C20-gibberellin 6-carboxylic acids	CHEMONTID:0004014	C20-gibberellins with a carboxyl group at the 6-position.
C20-gibberellins	CHEMONTID:0002999	Gibberellins with carboxy groups in positions 7 and 18 and some also in 20, while others have an aldehyde group in the latter position.
C24-propyl sterols and derivatives	CHEMONTID:0003061	Sterols that carry a hydroxyl group at the 3-position, and a propyl group at the 24-position of the steroid backbone.
C4-linked imidazole ribonucleosides and ribonucleotides	CHEMONTID:0003736	Nucleoside and nucleotide analogues with a structure that consists of an imidazole ring system which is substituted at the C4-position with a ribose moiety. Nucleotide analogues contain a phosphate group linked to the C5 carbon atom of the furanose.
C8-prenylated coumarins	CHEMONTID:0004821	Aromatic compounds containing a coumarin skeleton, which is substituted by a prenyl group at the C8-position.
Cadinanolides	CHEMONTID:0002048	Sesquiterpene lactones based on 2-dioxonaphtho[4a,4-b]furan.
Camptothecins	CHEMONTID:0000240	Heterocyclic compounds comprising a planar pentacyclic ring structure, that includes a pyrrolo[3,4-beta]-quinoline moiety (rings A, B and C), conjugated pyridone moiety (ring D) and one chiral center at position 20 within the alpha-hydroxy lactone ring with (S) configuration (the E-ring).
Capnellane and isocapnellane sesquiterpenoids	CHEMONTID:0003581	Sesquiterpenes with a structure characterized by the presence of a tricyclo[6.3.0.0^2,6]undecane ring system, which is also found in the hirsutane group. However, capnellanes carry two methyl groups at the 3-position.
Caprolactams	CHEMONTID:0000163	Cyclic amides of caproic acid. Caproic acid is the carboxylic acid derived from hexane with the general formula C5H11COOH.
Caprolactones	CHEMONTID:0001241	Cyclic esters of caproic acid. Caproic acid is the carboxylic acid derived from hexane with the general formula C5H11COOH.
Carbacephems	CHEMONTID:0002318	A new class of beta-lactam antibiotics similar in structure to the cephalosporins. They differ from cephalosporins, however, in the substitution of a sulfur atom in the dihydrothiazine ring with a methylene group to form a tetrahydropyridine ring.
Carbamate esters	CHEMONTID:0001162	Compounds containing an ester of carbamic acid with the general structure R2NC(=O)OR' (R' not H). They are esters of carbamic acids.
Carbamic acid halides	CHEMONTID:0001192	Compounds containing a carbamic acid derivative linked to a halogen atom.
Carbamic acids	CHEMONTID:0000271	Compounds containing the carbamic acid functional group, with the general structure RN(R')C(=O)OH or RN(R')C(=O)[O-] where R,R' = H or organyl group.
Carbamic acids and derivatives	CHEMONTID:0000318	Compounds comprising the carbamic acid functional group or a derivative thereof. They have the general structure RN(R')C(=O)OH or RN(R')C(=O)R\", where R,R'= H or organyl group, R\"= OH, alkyloxy, acyloxy, or halogen.
Carbapenams	CHEMONTID:0003066	Beta-lactams with a saturated carbapenem skeleton.
Carbapenems	CHEMONTID:0000167	Beta-lactam derivatives in which the beta-lactam ring shares the nitrogen atom with a pyrrole-2-carboxylic acid.
Carbazoles	CHEMONTID:0000210	Compounds containing a three ring system containing a pyrrole ring fused on either side to a benzene ring.
Carbene-type 1,3-dipolar compounds	CHEMONTID:0003632	1,3-dipolar compounds with the general structure X:-C=Z<-> X+=C-Z- (X = C or N; Z = C, N, or O).
Carbenes	CHEMONTID:0003629	The electrically neutral species H2C and its derivatives, in which the carbon is covalently bonded to two univalent groups of any kind or a divalent group and bears two non-bonding electrons, which may be spin-paired (singlet state) or spin-non-paired (triplet state). Subclasses of carbenes include acyl carbenes, imidoyl carbenes, and vinyl carbenes.
Carbides	CHEMONTID:0004469	Inorganic compounds containing a carbon atom combined with one or more elements of similar or lower electronegativity.
Carbo-azosulfones	CHEMONTID:0003209	Organosulfur compounds with the general formula RS(R')(=N)=O (R,R' = alkyl groups).
Carbocyclic fatty acids	CHEMONTID:0000495	Fatty acids containing a carbocyclic ring .
Carbodiimides	CHEMONTID:0000157	Organic compounds containing a functional group consisting of the formula RN=C=NR.
Carbodiselenoic acids	CHEMONTID:0003169	Organic acids with the general formula RCSe-SeH (R=H, organic group).
Carbodithioic acid esters	CHEMONTID:0003877	Ester derivatives of a carbodithioic acid (RC(=S)SH).
Carbodithioic acids	CHEMONTID:0002541	Organic acids with the general formula RC(=S)SH (R = organyl).
Carbodithiolactones	CHEMONTID:0003878	Cyclic organosulfur compounds with the general formula RC(=S)SR', where the central carbon atom is part of a ring; R,R' = organyl group.
Carbohydrates and carbohydrate conjugates	CHEMONTID:0000011	Monosaccharides, disaccharides, oligosaccharides, polysaccharides, and their derivatives.
Carbonate salts	CHEMONTID:0004447	Compounds that results from the interaction between a positive ion and the negatively charge oxygen atom of the carbonate ion.
Carbonic acid diesters	CHEMONTID:0001611	Compounds comprising the carbonic acid diester functional group.
Carbonic acid ester halides	CHEMONTID:0001652	Compounds comprising the carbonic acid ester halide functional group.
Carbonic acid monoesters	CHEMONTID:0001655	Compounds comprising the carbonic acid monoester functional group.
Carbonucleotoids	CHEMONTID:0001848	Organic peptide derivatives with monosaccharide units linked through Phosphate diester bonds.
Carbonyl compounds	CHEMONTID:0001831	Organic compounds containing a carbonyl group, with the general structure RC(=O)R', where R=organyl, R'=H, N, O, organyl group or halide group.
Carbonyl hydrates	CHEMONTID:0001605	Organic compounds containing two hydroxyl groups attached to a carbon atom.
Carbonyl imides	CHEMONTID:0002033	Organic compounds containing a carbonyl imide group (a carbon atom linked through a double bond to an oxygen atom, which is in turn linked to a nitrogen atom).
Carbonyl oxides	CHEMONTID:0002034	Organic compounds containing a carbonyl imide group (a carbon atom linked through a double bond to an oxygen atom, which is in turn linked to an oxygen atom).
Carbonyl ylides	CHEMONTID:0003622	1,3-Dipolar Compounds having the general structure R1C(R2)=[O+][C-](R3)R4 or R1[C+](R2)O[C-](R3)R4.
Carbonylimidazoles	CHEMONTID:0002529	Substituted imidazoles in which the imidazole ring bears a carbonyl group.
Carbonylnitrenes	CHEMONTID:0003974	Organic compounds containing a nitrene to which a carbonyl group is attached.
Carbopeptoids	CHEMONTID:0001849	Oligosaccharides having carbohydrate subunits linked to one another by amide bonds.
Carboperoxoic acids	CHEMONTID:0003164	Organic acids with the general formula RCO-OOH (R=H, organic group).
Carboperoxoselenoic acids	CHEMONTID:0003165	Organic acids with the general formula RCSe-OOH (R=H, organic group).
Carboperoxothioic OO-acids	CHEMONTID:0003166	Organic acids with the general formula RCS-OOH (R=H, organic group).
Carboselenoamides	CHEMONTID:0003127	Organic acid amide with the general formula RC(Se)NH2 (R=H, organic group).
Carboselenoic acids	CHEMONTID:0003126	Organic compounds containing at least one carboselenoyl group, with the formula RC(=O)SeH.
Carboselenoic acids and derivatives	CHEMONTID:0002427	Organic compounds containing at least one carboselenoyl group, with the formula RC(=O)Se (or a derivative thereof).
Carboselenothioic S-acids	CHEMONTID:0003167	Organic acids with the general formula RCSe-SH (R=H, organic group).
Carboselenothioic Se-acids	CHEMONTID:0003168	Organic acids with the general formula RCS-SeH (R=H, organic group).
Carbotelluroamides	CHEMONTID:0003129	Organic acid amide with the general formula RC(Te)NH2 (R=H, organic group).
Carbotelluroic acids and derivatives	CHEMONTID:0003128	Organic acids or derivatives thereof with the general formula RC(OH)=Te or RC(Te)OH (R = organyl).
Carbothioic halides	CHEMONTID:0003876	Organosulfur compounds with the general structure RC(=S)X, where R = organyl group and X = halogen atom.
Carbothioic O-acids	CHEMONTID:0003108	Organic acids with the general formula RCO-SH (R=H, organic group).
Carbothioic O-esters	CHEMONTID:0003874	Ester derivatives of carbothioic O-acids, with the general structure ROC(=S)R' where R = organyl group and R' = H or organyl group.
Carbothioic O-lactones	CHEMONTID:0003875	Cyclic organosulfur compounds with the general structure RC(=S)OR', R-R' = organyl group, where the central atom is part of the ring.
Carbothioic S-acids	CHEMONTID:0003107	Organic acids with the general formula RCS-OH (R=H, organic group).
Carbothioic S-esters	CHEMONTID:0003872	Ester derivatives of carbothioic S-acids, with the general structure RSC(=O)R' where R = organyl group and R' = H or organyl group.
Carbothioic S-lactones	CHEMONTID:0003873	Cyclic organosulfur compounds with the general structure RC(=O)SR', R-R' = organyl group, where the central atom is part of the ring.
Carboxamidines	CHEMONTID:0001045	Carboxylic acid derivatives containing the amidine group.
Carboximidamides	CHEMONTID:0003152	Organonitrogen compounds with the general formula RN=CN(R')(R''), (R,R',R'' = H or organyl group).
Carboximidic acids	CHEMONTID:0002484	Organic acids with the general formula RC(=N)-OH (R=H, organic group).
Carboximidic acids and derivatives	CHEMONTID:0002285	Compounds containing a carboximidic group, with the general formula R-C(=NR1)OR2.
Carboximidohydrazides	CHEMONTID:0003153	Organonitrogen compounds with the general formula HN(H)N(H)C(H)=NR' (R' = H or organyl).
Carboxylic acid amide acetals	CHEMONTID:0001667	Carboxylic acid derivatives two hydroxyl groups attached to a carbon atom, which in turn is linked to a nitrogen atom(substituted or not).
Carboxylic acid amides	CHEMONTID:0000475	Carboxylic acid derivatives containing a carbonyl group in which the carbon atom is linked to a nitrogen atom (substituted or not). The general formula of the carboxylic acid amide is R1C(=O)N(R2)R3 (R1,R2,R3=H, alkyl, aryl).
Carboxylic acid anhydrides	CHEMONTID:0001240	Carboxylic acid derivatives two carbonyl groups where the carbon atoms are both linked to the same oxygen atom.
Carboxylic acid azides	CHEMONTID:0001239	Carboxylic acid derivatives a carbonyl group in which the carbon is directly linked to an azide group (-N=N+=N-).
Carboxylic acid derivatives	CHEMONTID:0001093	Derivatives of carboxylic acid.
Carboxylic acid esters	CHEMONTID:0001238	Carboxylic acid derivatives in which the carbon atom from the carbonyl group is attached to an alkyl or an aryl moiety through an oxygen atom (forming an ester group).
Carboxylic acid hydrazides	CHEMONTID:0001165	Carboxylic acid derivatives containing a carbonyl group in which the carbon is directly linked to a hydrazide group (N-N).
Carboxylic acid imides	CHEMONTID:0001657	Carboxylic acid derivatives containing two carbonyl groups where the carbon atoms are both linked to the same nitrogen atom.
Carboxylic acid orthoesters	CHEMONTID:0001237	Carboxylic acid derivatives containing a carbon atom form three single bonds, each with one oxygen atom.
Carboxylic acid salts	CHEMONTID:0001166	Ionic derivatives of carboxylic acid.
Carboxylic acids	CHEMONTID:0001205	Compounds containing a carboxylic acid group with the formula -C(=O)OH.
Carboxylic acids and derivatives	CHEMONTID:0000265	Compounds containing a carboxylic acid group with the formula -C(=O)OH or a derivative thereof.
Cardenolide glycosides and derivatives	CHEMONTID:0001559	Compounds containing a carbohydrate glycosidically bound to the cardenolide moiety.
Cardenolides and derivatives	CHEMONTID:0001555	Steroid lactones containing a furan-2-one moiety linked to the C17 atom of a cyclopenta[a]phenanthrene derivative.
Cardiolipins	CHEMONTID:0001233	Glycerophospholipids in which the O1 and O3 oxygen atoms of the central glycerol moiety are each linked to one 1,2-diacylglycerol chain. Their general formula is OC(COP(O)(=O)OC[C@@H](CO[R1])O[R2])COP(O)(=O)OC[C@@H](CO[R3])O[R4], where R1-R4 are four fatty acyl chains.
Carnitines	CHEMONTID:0001609	Organic compounds containing the quaternary ammonium compound carnitine.
Carotenes	CHEMONTID:0001411	A type of unsaturated hydrocarbons containing eight consecutive isoprene units. They are characterized by the presence of two end-groups (mostly cyclohexene rings, but also cyclopentene rings or acyclic groups) linked by a long branched alkyl chain. Carotenes belonging form a subgroup of the carotenoids family.
Carotenoids	CHEMONTID:0001277	Organic compounds formed by eight consecutive isoprene fragments. Carotenoids are a subgroup of tetraterpenes, and are subdivided in two categories: Carotenes and Xanthophylls.
Catechin gallates	CHEMONTID:0001587	Organic compounds containing a gallate moiety glycosidically linked to a catechin.
Catechins	CHEMONTID:0001584	Compounds containing a catechin moiety, which is a 3,4-dihydro-2-chromene-3,5.7-tiol.
Catecholamines and derivatives	CHEMONTID:0000182	Compounds containing 4-(2-Aminoethyl)pyrocatechol [4-(2-aminoethyl)benzene-1,2-diol] or a derivative thereof formed by substitution.
Catechols	CHEMONTID:0000135	Compounds containing a 1,2-benzenediol moiety.
CDP-diacylglycerols	CHEMONTID:0001256	Glycerolipids containing a diacylglycerol, with a cytidine diphosphate attached to the oxygen O1 or O2 of the glycerol part.
CDP-ethanolamines	CHEMONTID:0004795	Phosphoethanolamines that consist of an ethanolamine having a cytidine 5'-diphosphate moiety attached to the oxygen.
CDP-glycerols	CHEMONTID:0001263	Glycerolipids with a cytidine diphosphate attached to the oxygen O1 or O2 of the glycerol part.
CDP-monoacylglycerols	CHEMONTID:0001264	Glycerolipids containing a monoacylglycerol, with a cytidine diphosphate attached to the oxygen O1 or O2 of the glycerol part.
Cedrane and isocedrane sesquiterpenoids	CHEMONTID:0003752	Sesquiternoids with a structure based on the cedrane or the isocedrane skeleton. Cedrane is a tricyclic molecules a 3,6,8,8-tetramethyl-1H-3a,7-methano-azulene moiety. Isocedrane is a rearranged cedrane arising from the migration of methyl group moved from the 6-position to the 4-position.
Cembrane diterpenoids	CHEMONTID:0000008	Diterpenoids with a structure based a cembrane skeleton, which is characterized by the presence of an isopropyl group at C-1 and by three symmetrically disposed methyl groups a the t C-4, -8 and -12 positions.
Cembranolides	CHEMONTID:0002502	Diterpenoids with a structure based on a cembrane skeleton fused to a lactone ring (5- or 6-membered).
Cephalosporin 3'-carbamates	CHEMONTID:0004410	Cephalosporins that are substituted at the 3'-position by a carbamate group.
Cephalosporin 3'-esters	CHEMONTID:0004411	Cephalosporins that are esterified at the 3'-position.
Cephalosporins	CHEMONTID:0000173	Compounds containing a 1,2-thiazine fused to a 2-azetidinone to for a oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid moiety or a derivative thereof.
Cephalotaxus alkaloids	CHEMONTID:0003778	Alkaloids with a structure based on the cephalotaxine skeleton, a tetracyclic 1,3-benzodioxole-containing compound which arises from the skeletal rearrangement of the hydroaromatic component of the Erythrina group.
Cephams	CHEMONTID:0001456	Organic compounds containing the 5-thia-1-azabicyclo[4.2.0]octan-8-one nucleus.
Cephamycins	CHEMONTID:0001458	Compounds containing a the cephalosporin (oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid) nucleus, with an alkyloxy group attached to the C6 carbon atom.
Cephems	CHEMONTID:0000168	Organic compounds containing the 5-thia-1-azabicyclo[4.2.0]oct-2-en-8-one nucleus.
Ceramide 2-N-methylaminoethylphosphonates	CHEMONTID:0003604	Phosphonosphingolipids consisting of a ceramide skeleton, which conjugated to the phosphonate moiety of a N-methyl linked 2-aminoethylphosphonate group.
Ceramide aminoethylphosphonates	CHEMONTID:0003605	Phosphonosphingolipids consisting of a ceramide skeleton, which conjugated to a 2-aminoethylphosphonate group.
Ceramide phosphoethanolamines	CHEMONTID:0001394	Ceramides with phosphoethanolamine as substituent. Phosphoethanolamine is an organophosphorus compound with the general structure NCCOP(O)(O)=O.
Ceramide phosphoinositols	CHEMONTID:0001399	Ceramides with phosphoinositol as substituent.
Ceramide-1-phosphates	CHEMONTID:0003390	Sphingoid analogue of phosphatidic acid formed from ceramide by adding a phosphate group at its 1-position.
Ceramides	CHEMONTID:0001418	Lipid molecules containing a sphingosine in which the amine group is linked to a fatty acid.
Cerveratrum-type alkaloids	CHEMONTID:0002729	Steroidal alkaloids containing the cevane (23-methyl-4- azahexacyclo[12.11.0.0^{2,11}.0^{4,9}.0^{15,24}.0^{18,23}]pentacosane) moiety, which is a six ring system. Cerveratrum alkaloids have 7-9 oxygen atoms and occur as free alkamines or esters of simple aliphatic or aromatic acids.
Chaetoglobosins	CHEMONTID:0003767	Cytochalasans with a structure in which the hydrogenated isoindole bears an (indol-3-yl)methyl group.
Chalcone- and dihydrochalcone O-glycosides	CHEMONTID:0001739	Compounds containing a O-glycosylated chalcone or dihydrochalcone moiety.
Chalcones and dihydrochalcones	CHEMONTID:0001630	Organic compounds containing 1,3-Diphenylpropenone (benzylideneacetophenone), ArCH=CH(=O)Ar, or its derivatives formed by substitution.
Chamigranes	CHEMONTID:0002517	Sesquiterpenoids characterized by a 1,1,5,9-tetramethylspiro[5,5]undecane skeleton, formally obtained by linking the C1-C6 and C6-C11 of farnesane together. They are predominantly isolated from algae.
Cheilanthane sesterterpenoids	CHEMONTID:0002881	Sesterterpnoids with a structure based on the cheilanthane backbone. Cheilanthane is a tricyclic compound consisting of a tetradecahydrophenanthrene ring system that carries two methyl groups at the 1-position, one methyl group at the 4a-,7-, and 8a-positions, as well as a 3-methylpentyl group at the 8-position.
Chemical entities	CHEMONTID:9999999	Constitutionally or isotopically distinct atoms, molecules, ions, ion pairs, radicals, radical ions, complexes, conformers etc., identifiable as a separately distinguishable entity.
Chlorinated biphenyls	CHEMONTID:0000500	Organic compounds containing at least one chlorine atom attached to either benzene ring of the biphenyl moiety.
Chlorinated dibenzo-p-dioxins	CHEMONTID:0000420	Organic compounds containing a chlorine atom attached to a dibenzo-p-dioxin moiety.
Chlorinated dibenzofurans	CHEMONTID:0001378	Organic compounds containing a chlorine atom attached to a dibenzofuran moiety.
Chlorins	CHEMONTID:0000716	Large heterocyclic aromatic ring systems consisting, at the core, of three pyrroles and one pyrroline coupled through four methine linkages.
Chloro-s-triazines	CHEMONTID:0004721	Aromatic compounds containing a 1,3,5-triazine ring that is substituted at the 2-position with a chlorine atom.
Chloroacetamides	CHEMONTID:0004527	Organic compounds with the general formula RNHC(=O)CH2Cl, where R= organyl group.
Chloroalkenes	CHEMONTID:0003905	Compounds derived from an alkene by replacing a hydrogen atom with a chlorine atom.
Chloroanilines	CHEMONTID:0004526	Aromatic compounds containing an aniline moiety substituted at one or more positions with a chlorine atom.
Chlorobenzenes	CHEMONTID:0001099	Compounds containing one or more chlorine atoms attached to a benzene moiety.
Chlorocatechols	CHEMONTID:0002696	Catechols having one or more chlorine atoms attached to the benzene ring.
Chloroethylnitrosoureas	CHEMONTID:0004508	Nitrosoureas derivatives where the central nitrogen atom carrying the nitroso group is also linked to a chloroethyl group.
Chlorofluorocarbons	CHEMONTID:0004521	Alkyhalide compounds that are composed only of chlorine, fluorine, and carbon atoms.
Chloroformic acid esters	CHEMONTID:0004430	Organochlorine compounds which are esters of chloroformic acid.
Chlorogenic acids and derivatives	CHEMONTID:0003004	Esters hydroxycinnamic acid with quinic acid (3-O, 4-O, or 4-O) or tartaric acid. The cinnamic acid moiety is hydroxylated at positions 3, 4, or both.
Chlorohydrins	CHEMONTID:0002608	Alcohols substituted by a chlorine atom at a saturated carbon atom otherwise bearing only hydrogen or hydrocarbyl groups.
Chlorohydroquinones	CHEMONTID:0003084	Organic compounds containing a chlorine atom attached to a hydroquinone.
Chloronaphthalenes	CHEMONTID:0004794	Aromatic heterocyclic compounds containing a naphthalene moiety substituted at one or more positions by a chlorine atom.
Chlorophenols	CHEMONTID:0002766	Halophenols carrying a chlorine on the benzene ring.
Chlorophenoxyacetates	CHEMONTID:0004525	Compounds containing a phenoxyacetate that carries one or more chlorine atoms on the benzene ring.
Chloropropanol esters	CHEMONTID:0001725	Compounds containing an ester derivative of chloropropanol.
Chloroquinolines	CHEMONTID:0004008	Compounds containing a quinoline moiety, which carries one or more chlorine atoms.
Cholestane steroids	CHEMONTID:0003566	Steroids with a structure containing the 27-carbon cholestane skeleton.
Cholesterols and derivatives	CHEMONTID:0001469	Compounds containing a 3-hydroxylated cholestane core.
Cholesteryl esters	CHEMONTID:0001490	Compounds containing an esterified cholestane moiety.
Cholines	CHEMONTID:0001012	Organic compounds containing a N,N,N-trimethylethanolammonium cation.
Chromeno[2,3-b]pyridine-5-ones	CHEMONTID:0004775	Compounds containing a Chromeno[2,3-b]pyridine moiety that carries an oxo group at the 5-position.
Chromeno[2,3-b]pyridines	CHEMONTID:0004774	Aromatic heteropolycyclic compounds containing pyridine linearly fused to the pyran moiety of a benzofuran ring system.
Chromenopyridines	CHEMONTID:0002339	Aromatic heterocyclic compounds structurally characterized by a pyridine ring fused to a chromene moiety.
Chromones	CHEMONTID:0000144	Compounds containing a benzopyran-4-one moiety.
Chrysenes	CHEMONTID:0001142	Compounds containing the polyaromatic chrysene moiety, which consists of a benzene ring fused to a phenanthrene ring system to form Benzo[a]phenanthrene.
Ciguatera toxins	CHEMONTID:0001808	Lipid-soluble polyether compounds consisting of 13 to 14 rings fused by ether linkages into a most rigid ladder-like structure.
Cinchona alkaloids	CHEMONTID:0002246	Alkaloids structurally characterized by the presence of the cinchonan skeleton, which consists of a quinoline linked to an azabicyclo[2.2.2]octane moiety.
Cinnamaldehydes	CHEMONTID:0000029	Organic aromatic compounds containing a cinnamlaldehyde moiety, consisting of a benzene and an aldehyde group to form 3-phenylprop-2-enal.
Cinnamic acid amides	CHEMONTID:0002810	Amides of cinnamic acids. Cinnamic acid is an aromatic compound containing a benzene and a carboxylic acid group forming 3-phenylprop-2-enoic acid.
Cinnamic acid esters	CHEMONTID:0003480	Compound containing an ester derivative of cinnamic acid.
Cinnamic acids	CHEMONTID:0002504	Organic aromatic compounds containing a benzene and a carboxylic acid group forming 3-phenylprop-2-enoic acid.
Cinnamic acids and derivatives	CHEMONTID:0000476	Organic aromatic compounds containing a benzene and a carboxylic acid group (or a derivative thereof) forming 3-phenylprop-2-enoic acid.
Cinnamyl alcohols	CHEMONTID:0002754	Aromatic alcohols containing a 3-phenylprop-2-en-1-ol moiety.
Cinnamylphenols	CHEMONTID:0003496	Organic compounds containing the 1,3-diphenylpropene moiety with one benzene ring bearing one or more hydroxyl groups.
Cinnolines	CHEMONTID:0000206	Organic aromatic compounds containing a benzene fused to a pyridazine ring.
Cladiellane diterpenoids	CHEMONTID:0004153	Diterpenoids containing a cladiellane skeleton. Cladiellane is a tricyclic ring system derived from eunicellane.
Clavams	CHEMONTID:0000169	Organic compounds containing a 4-oxa-1-azabicyclo[3.2.0]heptan-7-one moiety. Clavams are similar to penams, but with an oxygen substituted for the sulfur in the penam skeleton.
Clavines and derivatives	CHEMONTID:0002747	Hydroxy and dehydro derivatives of 6,8-dimethylergolenes and the corresponding ergolines.
Clavulones and derivatives	CHEMONTID:0001021	Ester derivatives of prostanoids.
Cobalamin derivatives	CHEMONTID:0000352	Organic compounds containing a corrin ring, a cobalt atom, an a nucleotide moiety. Cobalamin Derivatives are actually derived from vitamin B12.
Coenzyme A and derivatives	CHEMONTID:0001143	Derivative of vitamin B5 containing a 4'-phosphopantetheine moiety attached to a diphospho-adenosine.
Colchicines	CHEMONTID:0001390	Compounds containing the benzo[a]heptalene based colchicin moiety or a derivative thereof. Colchicine is a tricyclic compound consisting of a benzene ring angularly fused to a tetrahydroheptalene that carries a N-acetamide group.
Colensane and clerodane diterpenoids	CHEMONTID:0001757	Diterpenoids with a structure based on the clerodane or the colensane skeleton. Clerodanes arise from labdanes by two methyl migrations.
Complex tannins	CHEMONTID:0001712	Tannins made of a catechin bound to a gallotannin or elagitannin.
Conanine-type alkaloids	CHEMONTID:0002731	Alkaloids with a structure based on the conanine skeleton.
Condylocarpan alkaloids	CHEMONTID:0003756	Alkaloids with a structure based on the condylocarpan backbone. These alkaloids contain a ring system similar to that of the curan group, but are formed by cyclisation of C-21 on to C-7 in a Corynanthe precursor, rather than the formation of a 3,7 bond.
Correantan alkaloids	CHEMONTID:0003764	Alkaloids with a structure that is based on the correantan skeleton, which is a tetracyclic compound consisting of the seven-membered azepane ring fused to the pyridine moiety of a beta-carboline.
Corrinoids	CHEMONTID:0000353	Derivatives of the corrin nucleus, which contain four reduced or partly reduced pyrrole rings joined in a macrocycle by three =CH- groups and one direct carbon-carbon bond linking alpha positions.
Corroles	CHEMONTID:0001182	Compounds containing a corrole nucleus, which contains four pyrrole rings joined in a macrocycle by three groups and one direct carbon-carbon bond linking alpha positions.
Corynanthean-type alkaloids	CHEMONTID:0002750	Alkaloids with a structure based on the corynanthean nucleus, which is a tetracycle characterized by an indole fused to a quinolizidine. Additionally, the quinolizidine ring system is substituted to a 2-methylpropyl group and one ethyl group.
Coumarans	CHEMONTID:0004189	Compounds containing the coumaran skeleton, which consists of a benzene ring fused to a 2,3-dihydrofuran ring.
Coumaric acid esters	CHEMONTID:0000465	Aromatic compounds containing an ester derivative of coumaric acid.
Coumaric acids	CHEMONTID:0002505	Aromatic compounds containing a cinnamic acid moiety hydroxylated at the C2 (ortho-), C3 (meta-), or C4 (para-) carbon atom of the benzene ring.
Coumaric acids and derivatives	CHEMONTID:0000059	Aromatic compounds containing Aromatic compounds containing a cinnamic acid moiety (or a derivative thereof) hydroxylated at the C2 (ortho-), C3 (meta-), or C4 (para-) carbon atom of the benzene ring.
Coumarin glycosides	CHEMONTID:0001743	Aromatic compounds containing a carbohydrate moiety glycosidically bound to a coumarin moiety.
Coumarino-alpha-pyrones	CHEMONTID:0003190	Organic compounds with a structure characterized by the presence of a pyrano[3,2-c]chromene that carries two ketone groups at the 2- and 5-positions.
Coumarino-gamma-pyrones	CHEMONTID:0003191	Organic compounds with a structure characterized by the presence of a pyrano[3,2-c]chromene that carries two ketone groups at the 4- and 5-positions.
Coumarinolignans	CHEMONTID:0002545	Lignans with a structure characterized by the presence of a 1,4-dioxane bridge substituted by a phenyl group, and fused to a coumarin.
Coumarins and derivatives	CHEMONTID:0000145	Polycyclic aromatic compounds containing a 1-benzopyran moiety with a ketone group at the C2 carbon atom (1-benzopyran-2-one).
Coumaronochromenes	CHEMONTID:0003470	Isoflavonoids with a structure characterized by the presence of a benzopyran and a benzofuran, with the particularity that the pyran and the furan ring are fused to each other.
Coumaronochromones	CHEMONTID:0001742	Polycyclic aromatic compounds containing a 1-benzopyran-4-one and a benzofuran, where the furan ring and the pyran ring are fused together.
Coumaroyl glycosides	CHEMONTID:0002682	Compounds containing coumaric acid esterified with a glycosyl group.
Coumestans	CHEMONTID:0000354	Polycyclic aromatic compounds containing a coumestan moiety, which consists of a benzoxole fused to a chromen-2-one to form 1-Benzoxolo[3,2-c]chromen-6-one. They are oxidation products of pterocarpan.
Cresols	CHEMONTID:0001272	Aromatic compounds containing a methoxyphenol moiety.
Crinine- and Haemanthamine-type amaryllidaceae alkaloids	CHEMONTID:0004123	Amaryllidaceae alkaloids compounds with a structure based on the crinine or haemanthamine backbone. Both backbones have a common 5,10b-ethano bridge moiety in their frameworks, which is a very significant taxonomic feature, and the configurations of the 5,10b-ethano bridge are opposite to each other.
Croomine-type alkaloids	CHEMONTID:0003428	Stemona alkaloids with a structure containing a pyrrolo[1,2-a]azepine group, where the azepine moiety forms a spiro system with oxolane-5-one to give spiro[oxolane-2,9'-pyrrolo[1,2-a]azepine]-5-one. Moreover, another 5-oxooxolane moiety attached to the pyrrole ring.
Cucurbitacin glycosides	CHEMONTID:0001687	Polycyclic compounds containing a carbohydrate derivative glycosidically linked to a curcubitane nucleus.
Cucurbitacins	CHEMONTID:0001686	Polycyclic compounds containing the tetracyclic cucurbitane nucleus skeleton, 19-(10->9b)-abeo-10alanost-5-ene (also known as 9b-methyl-19-nor lanosta-5-ene), with a variety of oxygenation functionalities at different positions.
Cularin alkaloids and derivatives	CHEMONTID:0002657	Derivatives of benzyl isoquinolines in which a phenolic oxygen is incorporated into a seven-membered ring.
Cumenes	CHEMONTID:0000355	Aromatic compounds containing a prop-2-ylbenzene moiety.
Cumulenes	CHEMONTID:0004553	Hydrocarbons that contain at least three consecutive double bonds.
Curan alkaloids	CHEMONTID:0001783	Compounds containing the pentacyclic curan skeleton, which is structurally characterized by the presence of a pentacyclic 3,5-ethanopyrrolo[2,3-d]carbazole framework.
Curcuminoids	CHEMONTID:0000356	Aromatic compounds containing a curcumin moiety, which is composed of two aryl buten-2-one (feruloyl) chromophores joined by a methylene group.
Cyanate esters	CHEMONTID:0004560	Esters of cyanic acid, with the general formula R-OC#N (R = organyl group).
Cyanates	CHEMONTID:0000363	Organic compounds containing the cyanate functional group with the formula [OCN]-.
Cyanide salts	CHEMONTID:0004026	Organic compounds containing the cyanide anion [C-]#N.
Cyanoacrylates	CHEMONTID:0004768	Organonitrogen compounds containing an acrylic acid ester, which carries a nitrile group. They have the general structure ROC(=O)C(=C)C#N, where R is an organic group.
Cyanogenic glycosides	CHEMONTID:0002365	Glycosides in which the aglycone moiety contains a cyanide group.
Cyanogens	CHEMONTID:0004084	Organonitrogen compounds of the form NC-CN or X-CN, where X is a halogen.
Cyanohydrins	CHEMONTID:0001375	Organic compounds containing the cyanohydrin functional group, -C(OH)CN.
Cyanolipids	CHEMONTID:0001744	Lipids containing a five-carbon backbone that comprises a nitrile moiety together with a methylene group or double bond, and one or two hydroxyl groups. Cyanolipids are divided in four categories (type I-IV).
Cyathane diterpenoids	CHEMONTID:0002876	Fungal diterpenoid metabolites with a structure containing the cyathane skeleton (Tetradecahydro-3a,5a,8-trimethyl-1-(1-methylethyl)-cyclohept[e]indene).
Cyclamates	CHEMONTID:0000365	Compounds containing a cyclohexylsulfamic acid moiety.
Cyclic acetylenes	CHEMONTID:0002846	Cyclic hydrocarbons containing one or more acetylene groups.
Cyclic alcohols and derivatives	CHEMONTID:0001292	Organic compounds containing an aliphatic ring substituted with at least one hydroxyl group.
Cyclic allenes	CHEMONTID:0001679	Cyclic hydrocarbons (and by extension, derivatives formed by substitution) having two double bonds from one carbon atom to two others.
Cyclic carboximidic acids	CHEMONTID:0003881	Organic acids with the general formula RC(=N)-OH (R=H, organic group), where the carboximidic acid group is part of a cycle.
Cyclic depsipeptides	CHEMONTID:0001994	Natural or synthetic compounds having sequences of amino and hydroxy carboxylic acid residues (usually α-amino and α-hydroxy acids) connected in a ring. The residues are commonly but not necessarily regularly alternating.
Cyclic diarylheptanoids	CHEMONTID:0002652	Diarylheptanoids where the two aromatic rings of the skeleton are joined by a CC bond or an ether group, in addition to the heptane chain.
Cyclic dithiocarbamates	CHEMONTID:0003937	Organic compounds containing the dithiocarbamic acid group as part of a cycle.
Cyclic dithiocarbamic acid esters	CHEMONTID:0004722	Organosulfur cyclic compounds with the general formula R3SC(=S)N(R1)R2; R1-R2 = H or organyl group, R3 = organyl. Here, the dithiocarbamyl group is part of a ring.
Cyclic glycodepsipeptides	CHEMONTID:0002250	Peptidomimetic containing a glycodepisipeptide backbone that lies in a cyclic moiety.
Cyclic glycopeptides and derivatives	CHEMONTID:0001996	Compounds containing a carbohydrate covalently attached to a the backbone of a cyclic peptide.
Cyclic glycosylpeptides and derivatives	CHEMONTID:0003333	Compounds containing a carbohydrate moiety glycosidically linked to a cyclic peptide.
Cyclic imidothioic acids	CHEMONTID:0003884	Organic compounds containing the imidothioic acid group as part of a cycle.
Cyclic imidoyl halides	CHEMONTID:0003887	Imidoyl halides with the general formula R(X)C=NR' (R, R'=H, alkyl, aryl), where the central carbon atom is part of a ring.
Cyclic ketones	CHEMONTID:0003487	Organic compounds containing a ketone that is conjugated to a cyclic moiety.
Cyclic olefins	CHEMONTID:0002840	Olefins that contain at least one ring in their structure.
Cyclic peptides	CHEMONTID:0001995	Compounds containing a cyclic moiety bearing a peptide backbone.
Cyclic purine nucleotides	CHEMONTID:0001491	Purine nucleotides where one ribose group of the hydroxyl moiety and one phosphate group form a ring.
Cyclic pyrimidine nucleotides	CHEMONTID:0001492	Pyrimidine nucleotides where one ribose group of the hydroxyl moiety and one phosphate group form a ring.
Cyclic sulfite esters	CHEMONTID:0004751	Organic compounds containing a sulfite ester group as part of a ring.
Cyclitols	CHEMONTID:0004344	Compounds containing a cycloalkane moiety with one hydroxyl group on each of three or more ring atoms.
Cyclitols and derivatives	CHEMONTID:0002509	Compounds containing a cycloalkane moiety with one hydroxyl group on each of three or more ring atoms. These of also include derivatives where the hydrogen atom of one or more of the hydroxyl groups is replaced with another atom.
Cycloalkanes	CHEMONTID:0001016	Saturated monocyclic hydrocarbons (with or without side chains).
Cycloalkenes	CHEMONTID:0000017	Unsaturated monocyclic hydrocarbons having one endocyclic double bond.
Cycloalkynes	CHEMONTID:0002850	Unsaturated monocyclic hydrocarbons having one endocyclic triple bond.
Cycloartanols and derivatives	CHEMONTID:0002321	Steroids containing a cycloartanol moiety.
Cyclobutane lignans	CHEMONTID:0003419	Lignans with a structure characterized by to phenylpropanoid units coupled together through the C7-C7' and C8-C8' bonds, forming a cyclobutane ring with the C7, C7', C8', and C8 atoms.
Cyclobutyl nucleosides	CHEMONTID:0003723	Nucleoside analogues with a structure that consists of a cyclobutane that is substituted a the 1-position with a hydroxyl group and at the 3- position with either a purine or pyrimidine base.
Cycloheptafurans	CHEMONTID:0002936	Organic heterocyclic compounds containing a cycloheptane derivative fused to a furan. Furan is a five-membered aromatic ring with four carbon atoms and one oxygen atom.
Cycloheptapyrans	CHEMONTID:0002937	Organic heterocyclic compounds containing a cycloheptane derivative fused to a pyran. Pyran a six-membered heterocyclic, non-aromatic ring, made up of five carbon atoms and one oxygen atom and containing two double bonds.
Cycloheptathiophenes	CHEMONTID:0002338	Polycyclic compounds containing a thiophene ring fused to a 7 member carbocyclic moiety. Thiophene is 5-membered ring consisting of four carbon atoms and one sulfur atom.
Cyclohexane sesterterpenes	CHEMONTID:0003399	Sesterterpenoids with a structure containing a cyclohexane linked to an isoprenyl chain. They arise by cyclisation of the acyclic sesterterpene skeleton between carbons 14 and 19.
Cyclohexanols	CHEMONTID:0002647	Compounds containing an alcohol group attached to a cyclohexane ring.
Cyclohexanones	CHEMONTID:0002646	Compounds containing a cylohexenone moiety, which is a six-membered saturated aliphatic ring that carries a ketone.
Cyclohexene oximes	CHEMONTID:0004723	Cyclic compounds containing a oxime group which is substituted with a cyclohexene ring.
Cyclohexenones	CHEMONTID:0004325	Compounds containing a cylohexenone moiety, which is a six-membered aliphatic ring that carries a ketone and has one endocyclic double bond.
Cyclohexyl halides	CHEMONTID:0004485	Organohalogen compounds containing a monocyclic cyclohexane moiety that is substituted at one or more positions by an halogen atom.
Cyclohexylamines	CHEMONTID:0002674	Organic compounds containing a cyclohexylamine moiety, which consist of a cyclohexane ring attached to an amine group.
Cyclohexylphenols	CHEMONTID:0002099	Compounds containing a cyclohexane lined to a phenol group.
Cyclopentanols	CHEMONTID:0002938	Compounds containing a cyclopentane ring that carries an alcohol group.
Cyclopentyl nucleosides	CHEMONTID:0003738	Nucleoside analogues with a structure that consists of a cyclobutane that is substituted a the 1-position with a hydroxyl group and at the 2- or the 3- position with either a purine or pyrimidine base.
Cyclopropanecarboxylic acids	CHEMONTID:0002525	Organic compounds containing a carboxyl group attached to a cyclopropane ring.
Cyclopropanecarboxylic acids and derivatives	CHEMONTID:0002524	Organic compounds containing a carboxyl group (or a derivative thereof) attached to a cyclopropane ring.
Cyclopropyl nucleosides	CHEMONTID:0003741	Nucleoside analogues with a structure that consists of a cyclopropane that is substituted a the 1-position with a hydroxyl group and at the 2- position with either a purine or pyrimidine base.
Cyclopropyl purine nucleosides	CHEMONTID:0003721	Nucleoside analogues with a structure that consists of a cyclopropane that is substituted a the 1-position with a hydroxyl group and at the 2- position with either a purine base.
Cyclopropyl pyrimidine nucleosides	CHEMONTID:0003722	Nucleoside analogues with a structure that consists of a cyclopropane that is substituted a the 1-position with a hydroxyl group and at the 2- position with either a pyrimidine base.
Cyclopropylisoxazoles	CHEMONTID:0004724	Aromatic heterocyclic compounds containing an isoxazole ring substituted at one or more positions with a cyclopropyl group.
Cyclopyrrolones	CHEMONTID:0000192	Compounds belonging to a family of pyridin-2-ylpyrrole based chemicals. The pyrrole is usually fused to a benzene, pyrimidine, or dithiin.
Cyclosporins	CHEMONTID:0001601	Cyclic depsipeptides containing the cyclosporin backbone.
Cylindrospermopsins	CHEMONTID:0001899	Compounds containing a cylindrospermopsin moiety, which contains a triazaacenaphthylene moiety linked to a pyrimidinedione.
Cysteine and derivatives	CHEMONTID:0004313	Compounds containing cysteine or a derivative thereof resulting from reaction of cysteine at the amino group or the carboxy group, or from the replacement of any hydrogen of glycine by a heteroatom.
Cytisine and derivatives	CHEMONTID:0002722	Lupin alkaloids with a structure based on the cytisine skeleton, which is a tetracyclic ketone containing fused pyridine and piperidine rings that form pyrido[1,2a][1,5]diazocin-8-one.
Cytochalasans	CHEMONTID:0001821	Fungal metabolites structurally characterized by the presence of an isoindolone nucleus fused to a macrocyclic ring, which can either a lactone, as in cytochalasin B, a carbonate, as in cytochalasin E, or a carbocycle, as in cytochalasin D, H, and K.
Cytochalasins	CHEMONTID:0002852	Cytochalasans in which the hydrogenated isoindolone bears a benzyl group.