Molecular formula
C18H16N4O3
197 compounds have this formula on CompoundList.
- Molar mass
- 336.35g/mol
- Monoisotopic mass
- 336.1222Da
- Atoms
- 41
- Elements
- 4
- Rings plus double bonds
- 13
The formula C18H16N4O3 describes a molecule made of 18 carbon atoms, 16 hydrogen atoms, 4 nitrogen atoms and 3 oxygen atoms. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 1864.28%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 164.79%1.008 × 16 = 16.128 g/mol
- N Nitrogen × 416.66%14.007 × 4 = 56.028 g/mol
- O Oxygen × 314.27%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C18H16N4O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 197 compounds
DB289 metabolite M2
CAS 186953-55-9C18H16N4O3
![4-[(Dimethylamino)methylene]-2-(4-nitrophenyl)-5-phenyl-2,4-dihydro-3H-pyrazol-3-one chemical structure, C18H16N4O3, CAS 1164515-07-4](/s/JFMXGJMLYHUYNS-VBKFSLOCSA-N.svg)
4-[(Dimethylamino)methylene]-2-(4-nitrophenyl)-5-phenyl-2,4-dihydro-3H-pyrazol-3-one
CAS 1164515-07-4C18H16N4O3
N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-5-methyl-2-phenyltriazole-4-carboxamide
CAS 688030-52-6C18H16N4O3
3-(4-(Pyrimidin-2-yl)piperazine-1-carbonyl)-2H-chromen-2-one
CAS 546091-08-1C18H16N4O3
![Benzoic acid, 4-[2-(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)diazenyl]-, methyl ester chemical structure, C18H16N4O3, CAS 15790-15-5](/s/QJGOOFISESXSNF-UHFFFAOYSA-N.svg)
Benzoic acid, 4-[2-(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)diazenyl]-, methyl ester
CAS 15790-15-5C18H16N4O3
![N-(4-Methoxyphenyl)-4-oxo-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-2-carboxamide chemical structure, C18H16N4O3, CAS 956184-20-6](/s/XEUWTDBMZRSHIB-UHFFFAOYSA-N.svg)
N-(4-Methoxyphenyl)-4-oxo-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-2-carboxamide
CAS 956184-20-6C18H16N4O3
![5-(Furan-2-yl)-N-[(E)-[(E)-3-(2-methoxyphenyl)prop-2-enylidene]amino]-1H-pyrazole-3-carboxamide chemical structure, C18H16N4O3, CAS 1285546-77-1](/s/JHBLCZRYGJRHFA-XLWYYFMFSA-N.svg)
5-(Furan-2-yl)-N-[(E)-[(E)-3-(2-methoxyphenyl)prop-2-enylidene]amino]-1H-pyrazole-3-carboxamide
CAS 1285546-77-1C18H16N4O3
![Ethyl 2-amino-1-(2-furylmethyl)pyrrolo[3,2-b]quinoxaline-3-carboxylate chemical structure, C18H16N4O3, CAS 385373-15-9](/s/QFNUTSJINRSJPE-UHFFFAOYSA-N.svg)
Ethyl 2-amino-1-(2-furylmethyl)pyrrolo[3,2-b]quinoxaline-3-carboxylate
CAS 385373-15-9C18H16N4O3
![Methyl 4-({[1-(6-methyl-2-pyridinyl)-1H-imidazol-4-yl]carbonyl}amino)benzenecarboxylate chemical structure, C18H16N4O3, CAS 477890-17-8](/s/PDPZWTFPXHYLSM-UHFFFAOYSA-N.svg)
Methyl 4-({[1-(6-methyl-2-pyridinyl)-1H-imidazol-4-yl]carbonyl}amino)benzenecarboxylate
CAS 477890-17-8C18H16N4O3
![(5E)-6-Hydroxy-3-phenyl-5-[1-(2-phenylhydrazinyl)ethylidene]pyrimidine-2,4(3H,5H)-dione chemical structure, C18H16N4O3, CAS 578736-32-0](/s/MMHDGKAKWFHGMH-UDWIEESQSA-N.svg)
(5E)-6-Hydroxy-3-phenyl-5-[1-(2-phenylhydrazinyl)ethylidene]pyrimidine-2,4(3H,5H)-dione
CAS 578736-32-0C18H16N4O3
N-(3,4-Dimethylphenyl)-3-nitro-4-(1H-pyrazol-1-yl)benzenecarboxamide
CAS 321570-93-8C18H16N4O3
(1-Amino-1-oxopropan-2-yl) 1-phenyl-3-pyridin-3-ylpyrazole-4-carboxylate
CAS 956200-45-6C18H16N4O3
![3,5-Dimethyl-N-[(E)-(4-nitrophenyl)methylideneamino]-1H-indole-2-carboxamide chemical structure, C18H16N4O3, CAS 289721-64-8](/s/NHULWFAIZSXIMX-VXLYETTFSA-N.svg)
3,5-Dimethyl-N-[(E)-(4-nitrophenyl)methylideneamino]-1H-indole-2-carboxamide
CAS 289721-64-8C18H16N4O3
8-Hydroxy-1,3-dimethyl-7-(1-naphthylmethyl)-3,7-dihydro-1H-purine-2,6-dione
CAS 476480-55-4C18H16N4O3
![1,5-Dimethyl-4-{[(E)-(3-nitrophenyl)methylidene]amino}-2-phenyl-1,2-dihydro-3H-pyrazol-3-one chemical structure, C18H16N4O3, CAS 890138-98-4](/s/KJSZNFBWGBNEAU-UHFFFAOYSA-N.svg)
1,5-Dimethyl-4-{[(E)-(3-nitrophenyl)methylidene]amino}-2-phenyl-1,2-dihydro-3H-pyrazol-3-one
CAS 890138-98-4C18H16N4O3
4-((2,4-Dihydroxy-3-quinolinyl)diazenyl)-N,N-dimethylbenzamide
CAS 6300-34-1C18H16N4O3
N'-(3-Hydroxybenzylidene)-3-(3-methoxyphenyl)-1H-pyrazole-5-carbohydrazide
CAS 303106-41-4C18H16N4O3
2-(2-(1H-Indol-3-ylmethylene)hydrazino)-N-(4-methoxyphenyl)-2-oxoacetamide
CAS 881470-12-8C18H16N4O3
![4-[2-(3-Nitrophenyl)quinazolin-4-yl]morpholine chemical structure, C18H16N4O3, CAS 383893-78-5](/s/WOEYEDKSENBIKI-UHFFFAOYSA-N.svg)
4-[2-(3-Nitrophenyl)quinazolin-4-yl]morpholine
CAS 383893-78-5C18H16N4O3
N'-(4-Hydroxybenzylidene)-3-(3-methoxyphenyl)-1H-pyrazole-5-carbohydrazide
CAS 303106-13-0C18H16N4O3
2-(2-(1H-Indol-3-ylmethylene)hydrazino)-N-(3-methoxyphenyl)-2-oxoacetamide
CAS 764693-11-0C18H16N4O3
![1-Methyl-3-(2-methylallyl)-7-phenyloxazolo[2,3-f]purine-2,4(1H,3H)-dione chemical structure, C18H16N4O3, CAS 899751-86-1](/s/VOLJWSDKQQUJML-UHFFFAOYSA-N.svg)
1-Methyl-3-(2-methylallyl)-7-phenyloxazolo[2,3-f]purine-2,4(1H,3H)-dione
CAS 899751-86-1C18H16N4O3
5-Nitro-2-(1,5,6,8-tetrahydro-8-oxo-1,5-methano-2H-pyrido(1,2-a)(1,5)diazocin-3(4H)-yl)benzonitrile
CAS 442531-31-9C18H16N4O3
![4-[3-Nitro-4-(pyrrolidin-1-yl)phenyl]-1,2-dihydrophthalazin-1-one chemical structure, C18H16N4O3, CAS 672914-30-6](/s/FPCLJERZGAKAAX-UHFFFAOYSA-N.svg)
4-[3-Nitro-4-(pyrrolidin-1-yl)phenyl]-1,2-dihydrophthalazin-1-one
CAS 672914-30-6C18H16N4O3
- 3-Cinnamyl-1,7-dimethyloxazolo[2,3-f]purine-2,4(1H,3H)-dione899967-05-6C18H16N4O3
- Methyl 2-(4-(5-methyl-1H-1,2,3-triazol-1-yl)benzamido)benzoate915929-53-2C18H16N4O3
- 4-(3-Methoxyphenyl)-2-{[(pyridin-3-yl)methyl]amino}pyrimidine-5-carboxylic acid1775441-66-1C18H16N4O3
- N-(1,3-Benzodioxol-5-ylmethyl)-1-(4-methylphenyl)-1H-1,2,3-triazole-4-carboxamide951597-84-5C18H16N4O3
- N'-[(4-Hydroxyphenyl)methylidene]-3-(4-methoxyphenyl)-1H-pyrazole-5-carbohydrazide305355-28-6C18H16N4O3
- 5-(4-Methoxyphenyl)-1,3-dimethylpyrimido[4',5':3,4]pyrrolo[1,2-b]pyridazine-2,4(1H,3H)-dione573932-59-9C18H16N4O3
- 2-[4-(4-Methoxyphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]-N-(pyridin-4-yl)acetamide1060180-12-2C18H16N4O3
- 2-Methoxy-N-(2-(1-methyl-6-oxo-1,6-dihydropyridazin-3-yl)phenyl)nicotinamide1448036-87-0C18H16N4O3
- N-(2-(3-(Pyridin-4-yl)-1H-pyrazol-1-yl)ethyl)benzo[d][1,3]dioxole-5-carboxamide1448029-43-3C18H16N4O3
- 2-[4-(4-Methoxyphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]-N-(pyridin-2-yl)acetamide1058437-19-6C18H16N4O3
- 2-[4-(4-Methoxyphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]-N-(pyridin-3-yl)acetamide1058198-10-9C18H16N4O3
- 4-[2-(4-Nitrophenyl)quinazolin-4-yl]morpholine384366-70-5C18H16N4O3
- 5-Amino-2,3-bis(aziridin-1-yl)-6-methoxyacridine-1,4-dione77282-45-2C18H16N4O3
- 2-{[2-(5-Methoxy-1H-indol-3-yl)ethyl]amino}-5-nitrobenzonitrile945367-20-4C18H16N4O3
- 2-Hydroxy-N-(2-methoxyphenyl)-3,4-dihydropyrimido[1,2-a]benzimidazole-4-carboxamide1236257-55-8C18H16N4O3
- N-(2-Methoxyphenyl)-4-oxo-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-2-carboxamide956212-31-0C18H16N4O3
- (E)-N'-(2,4-Dihydroxybenzylidene)-3-(p-tolyl)-1H-pyrazole-5-carbohydrazide306300-72-1C18H16N4O3
- Ethyl 2-oxo-4-pyridin-3-yl-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-3-carboxylate896664-24-7C18H16N4O3
- Methyl 2-(5-methyl-1-phenyl-1H-1,2,3-triazole-4-carboxamido)benzoate890646-15-8C18H16N4O3
- Methyl 4-{[(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)carbonyl]amino}benzoate924840-92-6C18H16N4O3
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1-phenyl-5-methyl-1H-1,2,3-triazole-4-carboxamide950250-48-3C18H16N4O3
- 1H-Pyrazole-3-carboxylic acid, 4-hydroxy-1-phenyl-5-(phenylazo)-, ethyl ester15096-02-3C18H16N4O3
- N-(3-Methoxyphenyl)-4-oxo-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazole-2-carboxamide956574-66-6C18H16N4O3
- 1-Benzyl-5-(4-methoxyphenyl)-3a,6a-dihydropyrrolo[3,4-d][1,2,3]triazole-4,6(1H,5H)-dione19839-16-8C18H16N4O3
- Ethyl 2-hydroxy-4-(pyridin-4-yl)-3,4-dihydropyrimido[1,2-a]benzimidazole-3-carboxylate925573-25-7C18H16N4O3
- N-(Furan-2-ylmethyl)-1,7-dimethyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxamide896838-48-5C18H16N4O3
- Ethyl 7-(2-furyl)-5-phenyl-4,7-dihydro[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate727407-19-4C18H16N4O3
- 2-(3-Cyano-5-methyl-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidin-6-yl)ethyl 3-methylbenzenecarboxylate866137-41-9C18H16N4O3
- 2-(3,4,5-Trimethoxyphenyl)-[1,2,4]triazolo[1,5-c]quinazoline847783-47-5C18H16N4O3
- (E)-3-(But-2-en-1-yl)-1-methyl-7-phenyloxazolo[2,3-f]purine-2,4(1H,3H)-dione927542-86-7C18H16N4O3
- N-(2-Furylmethyl)-2-[3-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl]acetamide1170202-31-9C18H16N4O3
- 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-phenyl-4-(phenylazo)-, ethyl ester1914-78-9C18H16N4O3
- 2-(3,4-Dihydro-2H-pyrimido[1,2-a]benzimidazol-10-yl)-1-(4-nitrophenyl)ethanone442535-42-4C18H16N4O3
- 2-(3,4-Dihydro-2H-pyrimido[1,2-a]benzimidazol-10-yl)-1-(3-nitrophenyl)ethanone442535-43-5C18H16N4O3
- Benzeneacetic acid, 4-(5-methyl-4-((phenylamino)carbonyl)-1H-1,2,3-triazol-1-yl)-70672-49-0C18H16N4O3
- N-(4-Acetamidophenyl)-3-methyl-4-oxo-3,4-dihydrophthalazine-1-carboxamide727701-20-4C18H16N4O3
- Methyl 3-{[(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)carbonyl]amino}benzoate924833-78-3C18H16N4O3
- Methyl 4-({[4-(5-methyl-1H-1,2,3-triazol-1-yl)phenyl]carbonyl}amino)benzoate924828-85-3C18H16N4O3
- N-[(Furan-2-yl)methyl]-2-{8-methyl-4-oxo-3H,4H,5H-pyrimido[5,4-b]indol-3-yl}acetamide1105248-90-5C18H16N4O3
- (3-Methoxyphenyl)(3-(3-(pyridin-2-yl)-1,2,4-oxadiazol-5-yl)azetidin-1-yl)methanone1251564-92-7C18H16N4O3
- N-[(1-Methyl-1H-1,3-benzimidazol-2-yl)methyl]-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-carboxamide1435990-95-6C18H16N4O3
- 1-(2-Methoxyphenyl)-3-(2-(6-oxo-1,6-dihydropyridazin-3-yl)phenyl)urea1428366-59-9C18H16N4O3
- 5-(5-Cyclopropyl-1,2-oxazole-3-carbonyl)-1,5,9-triazatricyclo[8.4.0.0^{3,8}]tetradeca-3(8),9,11,13-tetraen-2-one2034412-81-0C18H16N4O3
- 4-Hydroxy-2-oxo-N'-[(1E)-(1H-pyrrol-2-yl)methylidene]-1-azatricyclo[7.3.1.0^{5,13}]trideca-3,5(13),6,8-tetraene-3-carbohydrazide477868-68-1C18H16N4O3
- 6-Amino-1,3-dibenzyl-5-nitroso-pyrimidine-2,4-dione112635-84-4C18H16N4O3
- N'-(4-Hydroxybenzylidene)-3-(4-methoxyphenyl)-1H-pyrazole-5-carbohydrazideC18H16N4O3
- N-(3-Acetamidophenyl)-3-methyl-4-oxo-3,4-dihydrophthalazine-1-carboxamide797002-98-3C18H16N4O3
- Ethanol, 2-((3-(4-methoxyphenyl)-1,2,4-triazolo(3,4-a)phthalazin-6-yl)oxy)-87540-57-6C18H16N4O3
- 2-({3-[4-Oxo-3(4H)-quinazolinyl]propanoyl}amino)benzamide902044-02-4C18H16N4O3
- N-[3-(Acetylamino)phenyl]-2-(4-oxoquinazolin-3(4H)-yl)acetamide1004120-99-3C18H16N4O3
- 1-(4-Methoxyphenyl)-4-[3-(pyridin-3-yl)-1,2,4-oxadiazol-5-yl]pyrrolidin-2-one941891-86-7C18H16N4O3
- 1-(4-Methoxyphenyl)-4-[3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl]pyrrolidin-2-one941960-96-9C18H16N4O3
- 4-(Methoxymethyl)-6-methyl-2-oxo-1-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]-1,2-dihydropyridine-3-carbonitrile915892-74-9C18H16N4O3
- 1-Methyl-3-((3-(phenylamino)phenyl)carbamoyl)-1H-pyrazole-4-carboxylic acid1174833-21-6C18H16N4O3
- 2-[3-(3-Methoxyphenyl)-6-oxopyridazin-1(6H)-yl]-N-(pyridin-3-yl)acetamide1100344-64-6C18H16N4O3
- 2-[3-(4-Methoxyphenyl)-6-oxopyridazin-1(6H)-yl]-N-(pyridin-3-yl)acetamide1100344-67-9C18H16N4O3
- 2-(3-(3-Methoxyphenyl)-6-oxopyridazin-1(6H)-yl)-N-(pyridin-2-yl)acetamide1232776-55-4C18H16N4O3
- N-Cyclopropyl-6-(3-pyridin-2-yl-isoxazol-4-ylmethoxy)-nicotinamide1159604-02-0C18H16N4O3
- 5-Cyclopropyl-N-(2-(1-methyl-6-oxo-1,6-dihydropyridazin-3-yl)phenyl)isoxazole-3-carboxamide1798024-72-2C18H16N4O3
- N-(3-(1H-Pyrrolo[2,3-b]pyridin-1-yl)propyl)-5-(furan-2-yl)isoxazole-3-carboxamide1795441-27-8C18H16N4O3
- N-(2-(2-(Pyridin-3-yl)-1H-imidazol-1-yl)ethyl)benzo[d][1,3]dioxole-5-carboxamide2034234-22-3C18H16N4O3
- N-(4-(3-Cyano-2-oxo-1,2,5,6,7,8-hexahydro-1,6-naphthyridine-6-carbonyl)phenyl)acetamide2034356-68-6C18H16N4O3
- (2-Hydroxyquinolin-4-yl)(3-(pyridazin-3-yloxy)pyrrolidin-1-yl)methanone2034501-10-3C18H16N4O3
- N-(2-Methoxyphenyl)-2-(2-oxo-2,3-dihydro-1H-imidazo[1,2-a]benzimidazol-3-yl)acetamide1169840-74-7C18H16N4O3
- 4,6,8,14-Tetramethyl-4,6,8,18-tetrazatetracyclo[8.8.0.02,7.012,17]octadeca-1(10),2(7),11,13,15,17-hexaene-3,5,9-trione177082-67-6C18H16N4O3
- 4,6,8,15-Tetramethyl-4,6,8,18-tetrazatetracyclo[8.8.0.02,7.012,17]octadeca-1(10),2(7),11,13,15,17-hexaene-3,5,9-trione329762-00-7C18H16N4O3
- 4-(Benzotriazole-1-carbonyl)-1-(4-methoxyphenyl)pyrrolidin-2-one881785-76-8C18H16N4O3
- N-(4-Acetamidophenyl)-1-methyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxamide899744-95-7C18H16N4O3
- N-(1-Cyanocyclopentyl)-2-(4-oxo-[1]benzofuro[3,2-d]pyrimidin-3-yl)acetamide1004072-37-0C18H16N4O3
- N-(2-Methyl-1H-benzimidazol-6-yl)-2-(3-oxo-2,3-dihydro-4H-1,4-benzoxazin-4-yl)acetamide929864-40-4C18H16N4O3
- Methyl 3-({[4-(5-methyl-1H-1,2,3-triazol-1-yl)phenyl]carbonyl}amino)benzoate924828-97-7C18H16N4O3
- Ethyl 3-({[6-(1H-pyrazol-1-yl)-3-pyridinyl]carbonyl}amino)benzoate957499-35-3C18H16N4O3
- Ethyl 4-({[6-(1H-pyrazol-1-yl)-3-pyridinyl]carbonyl}amino)benzoate957499-37-5C18H16N4O3
- 6,7-Dimethoxy-4-(2-methyl-1H-benzimidazol-6-yloxy)quinazoline288387-61-1C18H16N4O3
- N-(2-((2-Methylquinolin-5-yl)amino)-2-oxoethyl)-6-oxo-1,6-dihydropyridine-3-carboxamide1226445-94-8C18H16N4O3
- 4-{[2-(1-Oxo-2(1H)-phthalazinyl)propanoyl]amino}benzamide1269099-43-5C18H16N4O3
Frequently asked questions
What is the molar mass of C18H16N4O3?
The molar mass of C18H16N4O3 is 336.35 g/mol, calculated from standard atomic weights for 18 carbon atoms, 16 hydrogen atoms, 4 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 336.1222 Da.
How many compounds have the formula C18H16N4O3?
CompoundList lists 197 compounds with the molecular formula C18H16N4O3, including DB289 metabolite M2, 4-[(Dimethylamino)methylene]-2-(4-nitrophenyl)-5-phenyl-2,4-dihydro-3H-pyrazol-3-one, N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-5-methyl-2-phenyltriazole-4-carboxamide. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C18H16N4O3?
C18H16N4O3 has a degree of unsaturation of 13. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.