Molecular formula
C21H18N4O4
118 compounds have this formula on CompoundList.
- Molar mass
- 390.40g/mol
- Monoisotopic mass
- 390.1328Da
- Atoms
- 47
- Elements
- 4
- Rings plus double bonds
- 15
The formula C21H18N4O4 describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 4 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 × 2164.61%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 184.65%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 414.35%14.007 × 4 = 56.028 g/mol
- O Oxygen × 416.39%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C21H18N4O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 118 compounds
Aminotadalafil
CAS 385769-84-6C21H18N4O4
![2-[2,4-Dioxo-3-(phenylmethyl)-1-quinazolinyl]-N-(5-methyl-3-isoxazolyl)acetamide chemical structure, C21H18N4O4, CAS 892270-19-8](/s/HSYYMTSXZFJKBQ-UHFFFAOYSA-N.svg)
2-[2,4-Dioxo-3-(phenylmethyl)-1-quinazolinyl]-N-(5-methyl-3-isoxazolyl)acetamide
CAS 892270-19-8C21H18N4O4
N-(1,5-Dimethyl-3-oxo-2-phenylpyrazol-4-yl)-2-(1,3-dioxoisoindol-2-yl)acetamide
CAS 54840-93-6C21H18N4O4
N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-2-(2,3-dioxo-2,3-dihydro-1H-indol-1-yl)acetamide
CAS 617694-81-2C21H18N4O4
![4-[3-(2,3-Dihydro-1,4-benzodioxin-6-ylamino)imidazo[1,2-a]pyrazin-2-yl]-2-methoxyphenol chemical structure, C21H18N4O4, CAS 879591-79-4](/s/VTATXXICBYBQEB-UHFFFAOYSA-N.svg)
4-[3-(2,3-Dihydro-1,4-benzodioxin-6-ylamino)imidazo[1,2-a]pyrazin-2-yl]-2-methoxyphenol
CAS 879591-79-4C21H18N4O4
![N-[(Z)-3-[2-(1H-Benzimidazol-2-yl)ethylamino]-1-(furan-2-yl)-3-oxoprop-1-en-2-yl]furan-2-carboxamide chemical structure, C21H18N4O4, CAS 1164520-11-9](/s/RWJGSXLIKABMFV-LGMDPLHJSA-N.svg)
N-[(Z)-3-[2-(1H-Benzimidazol-2-yl)ethylamino]-1-(furan-2-yl)-3-oxoprop-1-en-2-yl]furan-2-carboxamide
CAS 1164520-11-9C21H18N4O4
1-(1-(((9H-Fluoren-9-yl)methoxy)carbonyl)azetidin-3-yl)-1H-1,2,3-triazole-4-carboxylic acid
CAS 1511834-90-4C21H18N4O4
N-(1-(4-Ethoxyphenyl)-2-methyl-1H-benzimidazol-5-yl)-N-((5-nitro-2-furyl)methylidene)amine
CAS 853407-12-2C21H18N4O4
4-(2-(2-Pyrazinylcarbonyl)carbohydrazonoyl)phenyl 4-ethoxybenzoate
CAS 767339-10-6C21H18N4O4
![2-{3-[(Furan-2-yl)methyl]-2,4-dioxo-1H,2H,3H,4H-pyrido[2,3-d]pyrimidin-1-yl}-N-(2-methylphenyl)acetamide chemical structure, C21H18N4O4, CAS 902922-94-5](/s/FMQAMWFXESVROC-UHFFFAOYSA-N.svg)
2-{3-[(Furan-2-yl)methyl]-2,4-dioxo-1H,2H,3H,4H-pyrido[2,3-d]pyrimidin-1-yl}-N-(2-methylphenyl)acetamide
CAS 902922-94-5C21H18N4O4
![1-[[3-[(2,3-Dioxoindol-1-yl)methyl]imidazolidin-1-yl]methyl]indole-2,3-dione chemical structure, C21H18N4O4, CAS 5250-09-9](/s/CZMDKNPACZEFRC-UHFFFAOYSA-N.svg)
1-[[3-[(2,3-Dioxoindol-1-yl)methyl]imidazolidin-1-yl]methyl]indole-2,3-dione
CAS 5250-09-9C21H18N4O4
![2-[2-(3,4-Dihydro-2H-quinolin-1-yl)-2-oxoethyl]-6-(3-nitrophenyl)pyridazin-3-one chemical structure, C21H18N4O4, CAS 941930-53-6](/s/MLAIAFATKCHVOU-UHFFFAOYSA-N.svg)
2-[2-(3,4-Dihydro-2H-quinolin-1-yl)-2-oxoethyl]-6-(3-nitrophenyl)pyridazin-3-one
CAS 941930-53-6C21H18N4O4
5-(Furan-2-yl)-N-(4-oxo-4-(quinolin-8-ylamino)butyl)isoxazole-3-carboxamide
CAS 1251579-10-8C21H18N4O4
![3-(1,3-Dioxoisoindol-2-yl)-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]propanamide chemical structure, C21H18N4O4, CAS 896660-54-1](/s/CUIFEPJIAYZFOI-UHFFFAOYSA-N.svg)
3-(1,3-Dioxoisoindol-2-yl)-N-methyl-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]propanamide
CAS 896660-54-1C21H18N4O4
![N-(3-(Benzo[d]oxazol-2-yl)phenyl)-3-(6-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)propanamide chemical structure, C21H18N4O4, CAS 1105229-19-3](/s/LQSLWWVXYLOBES-UHFFFAOYSA-N.svg)
N-(3-(Benzo[d]oxazol-2-yl)phenyl)-3-(6-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)propanamide
CAS 1105229-19-3C21H18N4O4
(E)-3-(3-Nitrophenyl)-N-(5-(5,6,7,8-tetrahydronaphthalen-2-yl)-1,3,4-oxadiazol-2-yl)acrylamide
CAS 851095-79-9C21H18N4O4
N1-(2-(1H-indol-3-yl)ethyl)-N2-(2-carbamoylbenzofuran-3-yl)oxalamide
CAS 920244-58-2C21H18N4O4
(E)-3-(4-Nitrophenyl)-N-(5-(5,6,7,8-tetrahydronaphthalen-2-yl)-1,3,4-oxadiazol-2-yl)acrylamide
CAS 887886-81-9C21H18N4O4
3-(2,5-Dioxopyrrolidin-1-yl)-N-(5-(4-methylbenzyl)-1,3,4-oxadiazol-2-yl)benzamide
CAS 1170885-20-7C21H18N4O4
![tert-Butyl 7-(6-nitropyridin-3-yl)-5H-pyrido[4,3-b]indole-5-carboxylate chemical structure, C21H18N4O4, CAS 1533432-50-6](/s/ISMSBSWTELQKON-UHFFFAOYSA-N.svg)
tert-Butyl 7-(6-nitropyridin-3-yl)-5H-pyrido[4,3-b]indole-5-carboxylate
CAS 1533432-50-6C21H18N4O4
2-(3,7-Dibenzyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-1-yl)acetic acid
CAS 721407-67-6C21H18N4O4
![2-{3-[(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)imino]-2-oxo-2,3-dihydro-1H-indol-1-yl}acetic acid chemical structure, C21H18N4O4, CAS 332168-65-7](/s/INSIDNHFTIQBOK-UHFFFAOYSA-N.svg)
2-{3-[(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)imino]-2-oxo-2,3-dihydro-1H-indol-1-yl}acetic acid
CAS 332168-65-7C21H18N4O4
![N-{3-[(1-Benzofuran-2-ylcarbonyl)amino]propyl}-4-hydroxyquinazoline-2-carboxamide chemical structure, C21H18N4O4, CAS 954293-70-0](/s/PMHVHJMAVOJCJX-UHFFFAOYSA-N.svg)
N-{3-[(1-Benzofuran-2-ylcarbonyl)amino]propyl}-4-hydroxyquinazoline-2-carboxamide
CAS 954293-70-0C21H18N4O4
![Ethyl 2-amino-1-(1,3-benzodioxol-5-ylmethyl)-1H-pyrrolo[2,3-b]quinoxaline-3-carboxylate chemical structure, C21H18N4O4, CAS 326924-80-5](/s/SOOLQJJBSVRABX-UHFFFAOYSA-N.svg)
Ethyl 2-amino-1-(1,3-benzodioxol-5-ylmethyl)-1H-pyrrolo[2,3-b]quinoxaline-3-carboxylate
CAS 326924-80-5C21H18N4O4
- Methyl 4-(1,9-dimethyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxamido)benzoate864855-57-2C21H18N4O4
- 3-[3-(2,3-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1-(4-methylphenyl)-1,4-dihydropyridazin-4-one1113122-40-9C21H18N4O4
- 3-[3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1-(4-methylphenyl)-1,4-dihydropyridazin-4-one1112339-10-2C21H18N4O4
- 10-Methyl-2-(3-nitrophenyl)-3-propylpyrimido[4,5-b]quinoline-4,5(3H,10H)-dione879758-10-8C21H18N4O4
- Aminotadalafil, (6S, 12aR)-1093940-70-5C21H18N4O4
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1,7-dimethyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxamide899399-50-9C21H18N4O4
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1,9-dimethyl-4-oxo-1,4-dihydropyrido[1,2-a]pyrrolo[2,3-d]pyrimidine-2-carboxamide864855-69-6C21H18N4O4
- N-(Furan-2-ylmethyl)-2-{3-[3-(4-methylphenyl)-1,2,4-oxadiazol-5-yl]-2-oxopyridin-1(2H)-yl}acetamide1185042-04-9C21H18N4O4
- 2-((4-(2-(4-Oxoquinazolin-3(4H)-yl)acetamido)but-2-yn-1-yl)oxy)benzamide1448031-00-2C21H18N4O4
- 1-(2,4-Dinitrophenyl)-2-(1,3-diphenylpropan-2-ylidene)hydrazine1555-81-3C21H18N4O4
- N-(Furan-2-ylmethyl)-2-{5-[3-(3-methylphenyl)-1,2,4-oxadiazol-5-yl]-2-oxopyridin-1(2H)-yl}acetamide1326868-79-4C21H18N4O4
- 2-Ethoxy-N-(2-((3-(furan-2-yl)-1,2,4-oxadiazol-5-yl)methyl)phenyl)nicotinamide1797139-69-5C21H18N4O4
- 1-(2-((3-(Furan-2-yl)-1,2,4-oxadiazol-5-yl)methyl)phenyl)-3-(2-methoxyphenyl)urea1797267-98-1C21H18N4O4
- N-(2-(6-(Furan-2-yl)-1H-imidazo[1,2-b]pyrazol-1-yl)ethyl)-7-methoxybenzofuran-2-carboxamide1795300-30-9C21H18N4O4
- 2-(Benzo[d]isoxazol-3-yl)-N-(1-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-1H-pyrazol-4-yl)acetamide1790197-88-4C21H18N4O4
- N-(2-((3-(Furan-2-yl)-1,2,4-oxadiazol-5-yl)methyl)phenyl)-4,5,6,7-tetrahydrobenzo[d]isoxazole-3-carboxamide1706114-41-1C21H18N4O4
- 4-Oxo-N-[(1r,4r)-4-[(3-cyanopyrazin-2-yl)oxy]cyclohexyl]-4H-chromene-2-carboxamide2034255-94-0C21H18N4O4
- Momelotinib metabolite M141841094-18-5C21H18N4O4
- 7-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]pyrazine-6-carboxylic acid2137457-64-6C21H18N4O4
- 1-Benzyl-4-hydroxy-N-(2-methoxyphenyl)-6-oxo-1H,6H,7H-pyrazolo[3,4-b]pyridine-5-carboxamide1251708-84-5C21H18N4O4
- 1-Benzyl-4-hydroxy-N~5~-(4-methoxyphenyl)-6-oxo-6,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxamide1251670-63-9C21H18N4O4
- 4-(2-Amino-3-propan-2-yloxycarbonylpyrrolo[3,2-b]quinoxalin-1-yl)benzoic acid799782-29-9C21H18N4O4
- 6-Benzyl-1,3-dimethyl-5-(3-nitrophenyl)pyrrolo[3,4-d]pyrimidine-2,4-dione831238-39-2C21H18N4O4
- 1-[3-(Furan-2-ylmethyl)-2-oxoquinazolin-4-yl]-3-(3-methoxyphenyl)urea941941-71-5C21H18N4O4
- 2-((3-(2,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)-6-phenylpyridazin-3(2H)-one1040657-67-7C21H18N4O4
- 2-((3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)-6-phenylpyridazin-3(2H)-one1040672-10-3C21H18N4O4
- Methyl 4-(2-(3-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)acetamido)benzoate1021037-66-0C21H18N4O4
- N-(4-(8-(2-Hydroxyethyl)-1,9-dioxo-8,9-dihydropyrido[4,3-b][1,6]naphthyridin-2(1H)-yl)phenyl)acetamide1158490-33-5C21H18N4O4
- 2-(2-Oxobenzo[d]oxazol-3(2H)-yl)-N-(2-((6-phenylpyridazin-3-yl)oxy)ethyl)acetamide1207048-99-4C21H18N4O4
- 7-Methoxy-N-(2-(6-oxo-3-(pyridin-3-yl)pyridazin-1(6H)-yl)ethyl)benzofuran-2-carboxamide1207045-95-1C21H18N4O4
- N-[2-(4-Methyl-5-oxo-3-phenyl-4,5-dihydro-1H-1,2,4-triazol-1-yl)ethyl]-4-oxo-4H-chromene-2-carboxamide1202991-33-0C21H18N4O4
- N-(Furan-2-ylmethyl)-2-(2-oxo-5-(3-(p-tolyl)-1,2,4-oxadiazol-5-yl)pyridin-1(2H)-yl)acetamide1251695-65-4C21H18N4O4
- N-(4-(Methoxymethyl)-2-oxo-1,2-dihydroquinolin-7-yl)-2-(4-oxoquinazolin-3(4H)-yl)acetamide1251561-85-9C21H18N4O4
- 6-(3-Methoxyphenyl)-2-((3-(3-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)pyridazin-3(2H)-one1207018-80-1C21H18N4O4
- 2-(4-Methoxybenzyl)-N-(1-methyl-1H-pyrazol-4-yl)-1,3-dioxo-2,3-dihydro-1H-isoindole-5-carboxamide1232784-95-0C21H18N4O4
- 2-(2-Methoxybenzyl)-N-(1-methyl-1H-pyrazol-4-yl)-1,3-dioxo-2,3-dihydro-1H-isoindole-5-carboxamide1282140-33-3C21H18N4O4
- 7-Methoxy-N-(2-((6-(pyridin-3-yl)pyridazin-3-yl)oxy)ethyl)benzofuran-2-carboxamide1286711-04-3C21H18N4O4
- 6-(2-(Benzo[d][1,3]dioxol-5-yl)-2-oxoethyl)-2-propyl-[1,2,4]triazolo[1,5-c]quinazolin-5(6H)-one1189912-64-8C21H18N4O4
- 2-(Benzo[d]isoxazol-3-yl)-N-(6-((2-methoxybenzyl)oxy)pyrimidin-4-yl)acetamide1396764-89-8C21H18N4O4
- N-(Benzo[d][1,3]dioxol-5-yl)-2-(2-(5-ethyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)acetamide941880-21-3C21H18N4O4
- N-(3-Methoxyphenyl)-5-methyl-2,4-dioxo-3-phenyl-2,3,4,5-tetrahydro-1H-pyrrolo[3,2-d]pyrimidine-7-carboxamide923185-58-4C21H18N4O4
- N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-(2-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)acetamide923122-17-2C21H18N4O4
- Methyl 4-{2-[2-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl]acetamido}benzoate923218-13-7C21H18N4O4
- N-(Benzo[d][1,3]dioxol-5-ylmethyl)-2-(2-(5-methyl-1,3,4-oxadiazol-2-yl)-1H-indol-1-yl)acetamide923679-94-1C21H18N4O4
- 2-((3-(3,5-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)-6-phenylpyridazin-3(2H)-one1040657-73-5C21H18N4O4
- 6-(3-Methoxyphenyl)-2-((3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)pyridazin-3(2H)-one1040642-66-7C21H18N4O4
- 6-(3,4-Dimethoxyphenyl)-2-((3-phenyl-1,2,4-oxadiazol-5-yl)methyl)pyridazin-3(2H)-one1040643-46-6C21H18N4O4
- Methyl 5-((4-cyclopropyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)methyl)furan-2-carboxylate1105225-45-3C21H18N4O4
- 1-{[(3-Acetylphenyl)carbamoyl]methyl}-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide1171644-59-9C21H18N4O4
- 3-Allyl-1-((3-(2-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione1207014-94-5C21H18N4O4
- N-(Furan-2-ylmethyl)-2-(2-oxo-3-(3-(o-tolyl)-1,2,4-oxadiazol-5-yl)pyridin-1(2H)-yl)acetamide1189898-37-0C21H18N4O4
- 3-(3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)-1-(m-tolyl)pyridazin-4(1H)-one1251618-82-2C21H18N4O4
- 1-((3-(3-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)-4-phenylpyrazine-2,3(1H,4H)-dione1251626-48-8C21H18N4O4
- 1-(2-Methoxyphenyl)-4-{[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl}-1,2,3,4-tetrahydropyrazine-2,3-dione1251552-93-8C21H18N4O4
- 8-Methoxy-2-oxo-N-{2-[3-(pyridin-4-yl)-1H-pyrazol-1-yl]ethyl}-2H-chromene-3-carboxamide1448075-65-7C21H18N4O4
- (S)-1-[1-Phenyl-1H-pyrazolo[3,4-b]quinoxalin-3-yl]-1,2-ethanediol diacetate55591-20-3C21H18N4O4
- N-(2-(2,4-Dioxooxazolidin-3-yl)-1-phenylethyl)-3-(1H-pyrazol-1-yl)benzamide2034270-71-6C21H18N4O4
- 3-(1-(5-(Furan-2-yl)isoxazole-3-carbonyl)piperidin-3-yl)quinazolin-4(3H)-one2034516-98-6C21H18N4O4
- N-[(E)-1,3-Diphenylpropylideneamino]-2,4-dinitroaniline5371-54-0C21H18N4O4
- 2-(3-Benzyl-2,4-dioxo-3,4-dihydropyrido[3,2-d]pyrimidin-1(2H)-yl)-N-(furan-2-ylmethyl)acetamide921530-64-5C21H18N4O4
- 3-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-N-[2-(4-oxoquinazolin-3(4H)-yl)ethyl]propanamide1282109-59-4C21H18N4O4
- 8-Methoxy-N-((1-methyl-5-(pyridin-2-yl)-1H-pyrazol-3-yl)methyl)-2-oxo-2H-chromene-3-carboxamide1421453-61-3C21H18N4O4
- 5-((3,5-Dimethoxyphenyl)ethynyl)-N-(2-methyl-6-nitrophenyl)pyrimidin-2-amine1538605-31-0C21H18N4O4
- 8-Methoxy-2-oxo-N-{2-[4-(pyridin-3-yl)-1H-pyrazol-1-yl]ethyl}-2H-chromene-3-carboxamide2097899-10-8C21H18N4O4
- 3-Cyclopropyl-1-((3-(2-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione2191266-99-4C21H18N4O4
- 3-Cyclopropyl-1-((3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione2188279-30-1C21H18N4O4
- 1-[(4-Methoxyphenyl)methyl]-4-({4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl}methyl)-1,2,3,4-tetrahydropyrazine-2,3-dione2549039-39-4C21H18N4O4
- 1-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,4-triazole-3-carboxylicacid2503207-94-9C21H18N4O4
- N-[(E)-1,1-Diphenylpropan-2-ylideneamino]-2,4-dinitroaniline74783-94-1C21H18N4O4
- N-[4-[(6,7-Dimethoxy-4-quinazolinyl)amino]phenyl]-2-furancarboxamide331770-22-0C21H18N4O4
- Tadalafil impurity 751093940-68-1C21H18N4O4
- 6-(1H-Imidazol-1-yl)-2-phenylquinazoline succinate1257259-94-1C21H18N4O4
- [(Cyanomethyl)(phenyl)carbamoyl]methyl 1,7-dimethyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate1384604-40-3C21H18N4O4
- 1-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,3-triazole-5-carboxylic acid2138390-29-9C21H18N4O4
- 8-Methoxy-N-{[1-methyl-3-(pyridin-2-yl)-1H-pyrazol-5-yl]methyl}-2-oxo-2H-chromene-3-carboxamide2319876-97-4C21H18N4O4
- 2-Cyano-N-ethyl-3-[2-(4-methoxyphenoxy)-4-oxopyrido[1,2-a]pyrimidin-3-yl]prop-2-enamide5281-63-0C21H18N4O4
Frequently asked questions
What is the molar mass of C21H18N4O4?
The molar mass of C21H18N4O4 is 390.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 390.1328 Da.
How many compounds have the formula C21H18N4O4?
CompoundList lists 118 compounds with the molecular formula C21H18N4O4, including Aminotadalafil, 2-[2,4-Dioxo-3-(phenylmethyl)-1-quinazolinyl]-N-(5-methyl-3-isoxazolyl)acetamide, N-(1,5-Dimethyl-3-oxo-2-phenylpyrazol-4-yl)-2-(1,3-dioxoisoindol-2-yl)acetamide. 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 C21H18N4O4?
C21H18N4O4 has a degree of unsaturation of 15. 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.