Listing 4825 chemical categories

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Name	ChemOnt ID	Description
Halo-S-triazines	CHEMONTID:0004639	Aromatic compounds containing a 1,3,5-triazine ring that is substituted at the 2-position with a halogen atom.
Haloacetanilides	CHEMONTID:0004716	Organic compounds containing an acetamide group conjugated to a phenyl group, which is in turn substituted with one or more halogen atoms.
Haloacetylenes and derivatives	CHEMONTID:0004565	Organohalogen compounds containing an acetylene group substituted with one or more halogen atoms.
Haloalkenes	CHEMONTID:0003903	Compounds derived from an alkene by replacing a hydrogen atom with a halogen atom.
Halobenzenes	CHEMONTID:0000035	Aromatic compounds containing a halogen atom linked to a benzene ring.
Halobenzoic acids	CHEMONTID:0003097	Benzoic acids carrying a halogen atom on the benzene ring.
Halobenzoic acids and derivatives	CHEMONTID:0003096	Benzoic acids or derivatives carrying a halogen atom on the benzene ring.
Halogen hydrides	CHEMONTID:0000548	Inorganic compounds in which the heaviest atom bonded to a hydrogen atom is a halogen.
Halogen nitrides	CHEMONTID:0000549	Inorganic compounds of nitrogen where nitrogen has a formal oxidation state of -3, and the heaviest atom bonded to it is a halogen.
Halogen organides	CHEMONTID:0000454	Inorganic compounds belonging to either the halogen hydrides, halogen nitrides, halogen oxides, or halogen sulfides.
Halogen oxides	CHEMONTID:0000550	Inorganic compounds containing an oxygen atom of an oxidation state of -2, in which the heaviest atom bonded to the oxygen is a halogen.
Halogen sulfides	CHEMONTID:0000551	Inorganic compounds containing a sulfur atom of an oxidation state of -2, in which the heaviest atom bonded to the oxygen is a halogen.
Halogenated fatty acids	CHEMONTID:0000483	Fatty acids with a chain that carries a halogen atom (Cl,F,I,Br).
Halogenated steroids	CHEMONTID:0002645	Compounds containing an steroid backbone, with at least one hydrogen substituted by a halogen atom.
Halohydrins	CHEMONTID:0002528	Alcohols substituted by a halogen atom at a saturated carbon atom otherwise bearing only hydrogen or hydrocarbyl groups (usually used to mean beta-halo alcohols).
Halomethanes	CHEMONTID:0004157	Organic compounds in which at least one of the four hydrogen atoms of methane (CH4) are replaced by halogen atoms.
Halonitrobenzenes	CHEMONTID:0004541	Compounds containing a nitrobenzene moiety, where the benzene ring carries an halogen atom.
Halophenols	CHEMONTID:0002320	Aromatic compounds containing benzene substituted by a hydroxyl group and a halogen atom.
Halopyridines	CHEMONTID:0003970	Organic compounds containing a pyridine ring substituted at one or more positions by a halogen atom.
Halopyrimidines	CHEMONTID:0001893	Aromatic compounds containing a halogen atom linked to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions.
Haloquinolines	CHEMONTID:0004403	Compounds containing a quinoline moiety, which is substituted at one or more ring positions by n halogen atom.
Halotoluenes	CHEMONTID:0004528	Aromatic compounds containing a toluene that is substituted at one or more ring positions with a halogen atom.
Harmala alkaloids	CHEMONTID:0001140	Compounds with a structure based on harmaline, harmine, harmalol, harman or a derivative of those parents. These parents are beta-carbolines, consisting of a pyrimidine fused to the pyrrole moiety of an indole to form a pyrido[3,4-b]indole.
Hasubanan alkaloids	CHEMONTID:0002792	Alkaloids with a structure based on the hasubanan skeleton, a tetracyclic propellane.
Hemiacetals	CHEMONTID:0001092	Compounds comprising the hemiacetal functional group, with the general formula R2C(OH)OR' ( R' not Hydrogen ).
Hemiaminals	CHEMONTID:0001088	Compounds comprising the hemiaminal functional group, with the general formula R2C(OH)NR2 where R can by a hydrogen or an alkyl group.
Hemiketals	CHEMONTID:0002539	Hemiacetals having the structure R2C(OH)OR' ( R' not H ), derived from ketones by formal addition of an alcohol to the carbonyl group.
Hepoxilins	CHEMONTID:0001020	Eicosanoids containing an oxirane group attached to the fatty acyl chain.
Heptoses	CHEMONTID:0001499	Monosaccharides in which the sugar unit is a seven-carbon containing moeity.
Heteroaromatic compounds	CHEMONTID:0004144	Compounds containing an aromatic ring where a carbon atom is linked to an hetero atom.
Heterocyclic diaryl ethers	CHEMONTID:0001215	Heterocyclic compounds comprising the diaryl ether functional group, with the general formula ROR' (R,R'=aryl).
Heterocyclic fatty acids	CHEMONTID:0001989	Fatty acids containing a heterocyclic attached to the acyl chain.
Hetidine-type diterpenoid alkaloids	CHEMONTID:0003779	Alkaloid diterpenoids with a structure based on the hetidine skeleton, which is a hexacyclic compound with an additional C-20-C-14 bond in the atisine-type.
Hetisine-type diterpenoid alkaloids	CHEMONTID:0003780	Alkaloid diterpenoids with a structure based on the hetisine skeleton, which is a heptacyclic compound with an additional N-C-6 bond as compared with the hetidine-type, and thus, is one of most complex entries in the atisane-class.
Hexacarboxylic acids and derivatives	CHEMONTID:0002967	Carboxylic acids containing exactly six carboxyl groups.
Hexahydrobenzophenanthridine alkaloids	CHEMONTID:0002666	Alkaloids containing a hexahydrobenzophenanthridine skeleton, which is a tetracyclic compound containing a benzene fused to a hexahydrophenanthridine moiety.
Hexamethonium compounds	CHEMONTID:0001282	Organic compounds containing a N,N,N,N',N',N'-hexamethylhexane-1,6-diaminium moiety.
Hexose phosphates	CHEMONTID:0002260	Carbohydrate derivatives containing a hexose substituted by one or more phosphate groups.
Hexoses	CHEMONTID:0001498	Monosaccharides in which the sugar unit is a is a six-carbon containing moeity.
Himachalane and lippifoliane sesquiterpenoids	CHEMONTID:0003545	Diterpenoids with a structure based on either the himachalane or the lippifoliane skeleton.
Hippuric acids	CHEMONTID:0001318	Compounds containing hippuric acid, which consists of a of a benzoyl group linked to the N-terminal of a glycine.
Hippuric acids and derivatives	CHEMONTID:0000179	Compounds containing a hippuric acid or a derivative, with a structure characterized the presence of a benzoyl group linked to the N-terminal of a glycine.
Histidine and derivatives	CHEMONTID:0004311	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.
Histrionicotoxins	CHEMONTID:0002064	Frog toxins structurally characterized by the presence of a dodecahydropyrrolo[1,2-a]quinolin-1-yl}ethanol moiety or a 2,7-disubstituted 1-azaspiro[5.5]undecan-8-ol moiety.
Holostanes	CHEMONTID:0002904	Steroids with a structure characterized by a lanostane moiety possessing a 18,20-lactone ring.
Homoaporphines	CHEMONTID:0002661	Alkaloids derived from phenethylisoquinoline precursors by direct intramolecular oxidative coupling. They incorporate a nucleus A and are always pentaoxygenated at C- 1, -2, - 10, - 11, and - 12. The nitrogen function in ring B is usually N-methylated, but it may also be secondary.
Homocyclic diaryl ethers	CHEMONTID:0001216	Homocyclic compounds comprising the diaryl ether functional group, with the general formula ROR' (R,R'=aryl).
Homoerythrinane alkaloids	CHEMONTID:0002781	Erythrina alkaloids predominantly possessing a 6-5-7-6-membered indolobenzazepine skeleton or a derivative thereof.
Homogeneous actinide compounds	CHEMONTID:0000430	Inorganic compounds containing only metal atoms,with the largest atom being a transition metal atom.
Homogeneous alkali metal compounds	CHEMONTID:0000425	Inorganic compounds containing only metal atoms,with the largest atom being a alkali metal atom.
Homogeneous alkaline earth metal compounds	CHEMONTID:0000428	Inorganic compounds containing only metal atoms,with the largest atom being a alkaline earth metal atom.
Homogeneous halogens	CHEMONTID:0000432	Inorganic non-metallic compounds in which the largest atom is a nobel gas.
Homogeneous lanthanide compounds	CHEMONTID:0000429	Inorganic compounds containing only metal atoms, with the largest atom being a lanthanide atom.
Homogeneous metal compounds	CHEMONTID:0000422	Inorganic compounds that contain only metal atoms.
Homogeneous metalloid compounds	CHEMONTID:0000431	Inorganic compounds containing only metal atoms,with the largest atom being a metalloid atom.
Homogeneous noble gases	CHEMONTID:0000433	Inorganic non-metallic compounds in which the largest atom is a halogen atom.
Homogeneous non-metal compounds	CHEMONTID:0000423	Inorganic compounds that contain only metal elements.
Homogeneous other non-metal compounds	CHEMONTID:0000434	Inorganic non-metallic compounds in which the largest atom belongs to the class of 'other nonmetals'.
Homogeneous post-transition metal compounds	CHEMONTID:0000427	Inorganic compounds containing only metal atoms,with the largest atom being a post-transition metal atom.
Homogeneous transition metal compounds	CHEMONTID:0000426	Inorganic compounds containing only metal atoms,with the largest atom being a transition metal atom.
Homoisoflavanones	CHEMONTID:0002898	Homoisoflavonoids with a structure based on the chromanone system. Chromanone is a bicyclic compound consisting of a 3,4-dihydro-1-benzopyran, which bears a ketone group at the 4-position.
Homoisoflavans	CHEMONTID:0002508	Homoisoflavonoids with a structure based on the chromane system. Chromone is a bicyclic compound consisting of a 3,4-dihydro-1-benzopyran.
Homoisoflavones	CHEMONTID:0001633	Homoisoflavonoids with a structure based on the chromone system. Chromone is a bicyclic compound consisting of a 1-benzopyran, which bears a ketone group at the 4-position.
Homoisoflavonoids	CHEMONTID:0002507	Naturally occurring oxygen heterocycles with a structure based on a 16-carbon skeleton including a chromanone, chromone or chromane system with a benzyl group at position C-3.
Homolycorine-type amaryllidaceae alkaloids	CHEMONTID:0004122	Amaryllidaceae alkaloids compounds containing the homolycorine skeleton, made up of a [3,4-g]benzopyranone ring due to the oxidation of the hydroxyl group at the C6. They are biogenetically formed through a restructuring of lycorine-type alkaloids.
Homoproaporphines	CHEMONTID:0002662	Analogues of proaporphines with the difference that the spirocyclohexenol ring is joined to a cyclohexane instead of a cyclopentane.
Hopane triterpenoids	CHEMONTID:0001824	Triterpenoids with a structure based on the hopane skeleton.
Hopanoids	CHEMONTID:0001823	Terpenoids containing hopane skeleton(A'-Neogammacerane), a pentacyclic structure with four cyclohexane rings and one cyclopentane ring (and often, a side chain emerging from C30).
Hybrid glycopeptides	CHEMONTID:0002009	Compounds containing a carbohydrate component linked to a hybrid peptide component.
Hybrid peptides	CHEMONTID:0002010	Compounds containing at least two different types of amino acids (alpha, beta, gamma, delta) linked to each other through a peptide bond.
Hydantoins	CHEMONTID:0002273	Heterocyclic compounds containing an imidazolidine substituted by ketone group at positions 2 and 4.
Hydrazidines	CHEMONTID:0002464	Hydrazine derivatives with the general formula RC(NHNH2)2=NNH2.
Hydrazinecarboxamides	CHEMONTID:0003134	Organonitrogen compounds with the general formula RN(H)N(H)C(=O)N (R = organyl).
Hydrazinecarboxylic acid esters	CHEMONTID:0004715	Ester derivatives of hydrazinecarboxylic acids.
Hydrazinecarboxylic acids	CHEMONTID:0003133	Organonitrogen compounds with the general formula RN(H)N(H)C(=O)OH (R = organyl).
Hydrazinecarboxylic acids and derivatives	CHEMONTID:0003132	Organonitrogen compounds with the general formula RN(H)N(H)C(=O)OR' (R = organyl, R = any).
Hydrazines and derivatives	CHEMONTID:0000112	Compounds comprising the hydrazine functional group, with the general formula R1R2NNR3R4.
Hydrazineselenoamides	CHEMONTID:0003149	Organoselenium compounds with the general formula N(R)NC(=Se)N(R')R'' (R = organyl; R',R'' = H or organyl).
Hydrazinesulfinic acids	CHEMONTID:0003111	Sulfinic acids with the general formula R-N-NS(=O)=O.
Hydrazinopeptides	CHEMONTID:0001958	Compounds in which one of the native CONH links is replaced by a CONHNH (hydrazido) fragment.
Hydrazinosulfonyl compounds	CHEMONTID:0003138	Hydrazine derivatives with the general formula RS(=O)(=O)N(H)N (R = organyl).
Hydrazones	CHEMONTID:0000116	Compounds containing an N-Alkylidene derivative of hydrazine. They have the generic structure RNN=C(R')R\" (R,R',R\"= H or organyl group).
Hydrobromides	CHEMONTID:0003920	Organic salts that results from the reaction of hydrobromic acid with an organic base.
Hydrocarbon derivatives	CHEMONTID:0004150	Derivatives of hydrocarbons obtained by substituting one or more carbon atoms by an heteroatom. They contain at least one carbon atom and heteroatom.
Hydrocarbons	CHEMONTID:0002837	Organic compounds made up only of carbon and hydrogen atoms.
Hydrochlorides	CHEMONTID:0003921	Organic salts that results from the reaction of hydrochloric acid with an organic base.
Hydrofluorocarbons	CHEMONTID:0004522	Alkyhalide compounds that are composed only of hydrogen, fluorine, and carbon atoms.
Hydrolyzable tannins	CHEMONTID:0001710	Tannins with a structure characterized by either of the following models. In model 1, the structure contains galloyl units (in some cases, shikimic acid units) are linked to diverse polyol carbohydrate-, catechin-, or triterpenoid units. In model 2, contains at least two galloyl units C-C coupled to each other, and do not contain a glycosidically linked catechin unit.
Hydroperoxy fatty acids	CHEMONTID:0000340	Fatty acids containing a hydroperoxide group attached to the chain.
Hydroperoxyeicosapentaenoic acids	CHEMONTID:0001011	Eicosanoic acids with an attached hydroperoxyl group and five CC double bonds.
Hydroperoxyeicosatetraenoic acids	CHEMONTID:0000387	Eicosanoic acids with an attached hydroperoxyl group and four CC double bonds.
Hydroperoxyeicosatrienoic acids	CHEMONTID:0000383	Eicosanoic acids with an attached hydroperoxyl group and three CC double bonds.
Hydrophenanthrenes	CHEMONTID:0000223	A phenanthrene derivative where at least one ring CC bond is substituted by hydrogenation.
Hydropyridines	CHEMONTID:0002224	Compounds containing a hydrogenated pyridine ring (i.e. containing less than the maximum number of double bonds.).
Hydropyrimidine carboxylic acids and derivatives	CHEMONTID:0002222	Compounds containing a hydrogenated pyrimidine ring which bears a carboxylic acid group.
Hydropyrimidines	CHEMONTID:0002202	Compounds containing a hydrogenated pyrimidine ring (i.e. containing less than the maximum number of double bonds.).
Hydroquinolines	CHEMONTID:0001715	Derivatives of quinoline in which in which at least one double bond in the quinoline moiety are reduced by adding two hydrogen atoms.
Hydroquinolones	CHEMONTID:0001716	Compounds containing a hydrogenated quinoline bearing a ketone group.
Hydroquinones	CHEMONTID:0000136	Compounds containing a hydroquinone moiety, which consists of a benzene ring with a hydroxyl groups at positions 1 and 4.
Hydroxamic acid esters	CHEMONTID:0003880	Hydroxamic acids in which the hydrogen of the hydroxy group has been replaced by an organyl group.
Hydroxamic acids	CHEMONTID:0000376	Compounds containing a hydroxamic acid functional group in which a hydroxylamine is inserted into a carboxylic acid. Its general structure is R-CO-NH-OH, with an R as an organic residue.
Hydroxy acids and derivatives	CHEMONTID:0000472	Compounds comprising one or more hydroxy acid groups.
Hydroxy bile acids, alcohols and derivatives	CHEMONTID:0002194	Bile acids, alcohols or derivatives bearing at least hydroxyl group.
Hydroxy fatty acids	CHEMONTID:0000341	Fatty acids in which the chain bears a hydroxyl group.
Hydroxy-7-aporphines	CHEMONTID:0003021	Aporphines containing a hydroxyl group at the 7-position.
Hydroxyanilides	CHEMONTID:0004200	Compounds that contain an anilide moiety, where the benzene ring carries a hydroxyl group.
Hydroxyanthraquinones	CHEMONTID:0001598	Compounds containing a hydroxyanthraquinone moiety, which consists of an anthracene bearing a quinone, and hydroxyl group.
Hydroxybenzaldehydes	CHEMONTID:0003978	Organic aromatic compounds containing a benzene ring carrying an aldehyde group and a hydroxyl group.
Hydroxybenzoic acid derivatives	CHEMONTID:0001248	Compounds containing a hydroxybenzoic acid (or a derivative), which is a benzene ring bearing a carboxyl and a hydroxyl groups.
Hydroxybenzonitriles	CHEMONTID:0004680	Aromatic containing a benzonitrile group moiety that carries an hydroxyl group on the benzene ring.
Hydroxycinnamic acid esters	CHEMONTID:0003002	Ester derivatives of hydroxycinnamic acids.
Hydroxycinnamic acid glycosides	CHEMONTID:0003003	Glycosylated hydoxycinnamic acids derivatives.
Hydroxycinnamic acids	CHEMONTID:0002503	Compounds containing an cinnamic acid where the benzene ring is hydroxylated.
Hydroxycinnamic acids and derivatives	CHEMONTID:0001391	Compounds containing an cinnamic acid (or a derivative thereof) where the benzene ring is hydroxylated.
Hydroxycoumarins	CHEMONTID:0002908	Coumarins that contain one or more hydroxyl groups attached to the coumarin skeleton.
Hydroxyeicosapentaenoic acids	CHEMONTID:0000214	Eicosanoic acids with an attached hydroxyl group and five CC double bonds.
Hydroxyeicosatetraenoic acids	CHEMONTID:0000046	Eicosanoic acids with an attached hydroxyl group and four CC double bonds.
Hydroxyeicosatrienoic acids	CHEMONTID:0000030	Eicosanoic acids with an attached hydroxyl group and three CC double bonds.
Hydroxyflavonoids	CHEMONTID:0002991	Flavonoids in which one or more hydroxyl groups are attached to the flavonoid skeleton.
Hydroxyindoles	CHEMONTID:0004162	Organic compounds containing an indole moiety that carries a hydroxyl group.
Hydroxyisoflavonoids	CHEMONTID:0004154	Organic compounds containing an isoflavonoid skeleton carrying one or more hydroxyl groups.
Hydroxylamine O-sulfonic acids	CHEMONTID:0003110	Sulfonic acids with the general formula R-N-OS(O)(=O)=O. They can be synthesized through reaction of hydroxylamine and chlorosulfonic acids.
Hydroxymercuribenzoic acids	CHEMONTID:0004028	Benzoic acids containing a hydroxymercury (-HgOH) group attached to the benzene moiety.
Hydroxypyridines	CHEMONTID:0004151	Organic compounds containing a pyridine ring substituted at one or more positions by a hydroxyl group.
Hydroxypyrimidines	CHEMONTID:0004161	Organic compounds containing a hydroxyl group attached to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions.
Hydroxyquinolines	CHEMONTID:0000057	Compounds containing a quinoline moiety bearing a hydroxyl group.
Hydroxyquinolones	CHEMONTID:0001714	Compounds containing a quinoline moiety bearing a hydroxyl group and a ketone. Quinoline or benzo[b]pyridine is a bicyclic compound that consists of benzene fused to a pyridine.
Hydroxyquinols and derivatives	CHEMONTID:0000380	Compounds containing a 1,2,4-trihydroxybenzene moiety.
Hydroxysteroids	CHEMONTID:0001295	Compounds containing an steroid backbone, with at least one hydrogen substituted by a hydroxyl group.
Hypoxanthines	CHEMONTID:0000246	Compounds containing the purine derivative 1H-purin-6(9H)-one. Purine is a bicyclic aromatic compound made up of a pyrimidine ring fused to an imidazole ring.