Molecular formula
C21H19N3O4
263 compounds have this formula on CompoundList.
- Molar mass
- 377.40g/mol
- Monoisotopic mass
- 377.1376Da
- Atoms
- 47
- Elements
- 4
- Rings plus double bonds
- 14
The formula C21H19N3O4 describes a molecule made of 21 carbon atoms, 19 hydrogen atoms, 3 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 × 2166.83%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 195.07%1.008 × 19 = 19.152 g/mol
- N Nitrogen × 311.13%14.007 × 3 = 42.021 g/mol
- O Oxygen × 416.96%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C21H19N3O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 263 compounds
2-Ethoxy-N-(1-(furan-2-carbonyl)indolin-6-yl)nicotinamide
CAS 1448128-40-2C21H19N3O4
(4-(Furan-2-carbonyl)piperazin-1-yl)(3-(pyridin-2-yloxy)phenyl)methanone
CAS 1797183-04-0C21H19N3O4
2-(1-(5-Phenylisoxazole-3-carbonyl)azetidin-3-yl)-3a,4,7,7a-tetrahydro-1H-isoindole-1,3(2H)-dione
CAS 1795422-69-3C21H19N3O4
![1-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-pyrazole-4-carboxylicacid chemical structure, C21H19N3O4, CAS 2387178-97-2](/s/QKIIUECBEWUNDD-UHFFFAOYSA-N.svg)
1-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-pyrazole-4-carboxylicacid
CAS 2387178-97-2C21H19N3O4
![2-[5-(2-Nitrophenyl)furan-2-yl]-3-propyl-1,2-dihydroquinazolin-4-one chemical structure, C21H19N3O4, CAS 381173-97-3](/s/TVHTWJOJOGWUQE-UHFFFAOYSA-N.svg)
2-[5-(2-Nitrophenyl)furan-2-yl]-3-propyl-1,2-dihydroquinazolin-4-one
CAS 381173-97-3C21H19N3O4
![Ethyl 4-[3-(2-methyl-1H-benzimidazol-1-yl)-2,5-dioxopyrrolidin-1-yl]benzoate chemical structure, C21H19N3O4, CAS 587848-91-7](/s/PUIXYCPLHPNAHP-UHFFFAOYSA-N.svg)
Ethyl 4-[3-(2-methyl-1H-benzimidazol-1-yl)-2,5-dioxopyrrolidin-1-yl]benzoate
CAS 587848-91-7C21H19N3O4
![Methyl {4-[(E)-2-(1H-benzimidazol-2-yl)-2-cyanoethenyl]-2-ethoxyphenoxy}acetate chemical structure, C21H19N3O4, CAS 663201-16-9](/s/XJBUGBUKGSELJO-XNTDXEJSSA-N.svg)
Methyl {4-[(E)-2-(1H-benzimidazol-2-yl)-2-cyanoethenyl]-2-ethoxyphenoxy}acetate
CAS 663201-16-9C21H19N3O4
![4-[[2-(1-Oxo-2-prop-2-enylisoquinolin-5-yl)oxyacetyl]amino]benzamide chemical structure, C21H19N3O4, CAS 903273-61-0](/s/BMDLOAGQUBASKM-UHFFFAOYSA-N.svg)
4-[[2-(1-Oxo-2-prop-2-enylisoquinolin-5-yl)oxyacetyl]amino]benzamide
CAS 903273-61-0C21H19N3O4
![N-(2-Methyl-4-nitrophenyl)-1-[(3-methylphenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carboxamide chemical structure, C21H19N3O4, CAS 946247-50-3](/s/DKZQJQWGIPPDRA-UHFFFAOYSA-N.svg)
N-(2-Methyl-4-nitrophenyl)-1-[(3-methylphenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 946247-50-3C21H19N3O4
![N-(2-Methyl-5-nitrophenyl)-1-[(3-methylphenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carboxamide chemical structure, C21H19N3O4, CAS 933205-70-0](/s/GMXXWCVXHQDQAN-UHFFFAOYSA-N.svg)
N-(2-Methyl-5-nitrophenyl)-1-[(3-methylphenyl)methyl]-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 933205-70-0C21H19N3O4
N-(3-Acetylphenyl)-2-(3-(4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl)acetamide
CAS 922973-68-0C21H19N3O4
![2-[3-(1,3-Benzodioxol-5-yl)-6-oxopyridazin-1-yl]-N-(2,5-dimethylphenyl)acetamide chemical structure, C21H19N3O4, CAS 941972-71-0](/s/OSXXFVZZZOOGFI-UHFFFAOYSA-N.svg)
2-[3-(1,3-Benzodioxol-5-yl)-6-oxopyridazin-1-yl]-N-(2,5-dimethylphenyl)acetamide
CAS 941972-71-0C21H19N3O4
N-(3-Acetylphenyl)-2-(3-(3-methoxyphenyl)-6-oxopyridazin-1(6H)-yl)acetamide
CAS 1171535-26-4C21H19N3O4
![N-(1,3-Benzodioxol-5-yl)-2-[3-(2,4-dimethylphenyl)-6-oxopyridazin-1-yl]acetamide chemical structure, C21H19N3O4, CAS 941883-42-7](/s/UXMCMYVBVUXFLA-UHFFFAOYSA-N.svg)
N-(1,3-Benzodioxol-5-yl)-2-[3-(2,4-dimethylphenyl)-6-oxopyridazin-1-yl]acetamide
CAS 941883-42-7C21H19N3O4
![N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-[3-(2-methylphenyl)-6-oxopyridazin-1-yl]acetamide chemical structure, C21H19N3O4, CAS 941883-67-6](/s/UHPNALSZRWSUAF-UHFFFAOYSA-N.svg)
N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-[3-(2-methylphenyl)-6-oxopyridazin-1-yl]acetamide
CAS 941883-67-6C21H19N3O4
![2-(1,3-Dioxoisoindol-2-yl)-N-[4-methyl-3-(2-oxopyrrolidin-1-yl)phenyl]acetamide chemical structure, C21H19N3O4, CAS 922926-72-5](/s/KZVWLDNDVMJOMQ-UHFFFAOYSA-N.svg)
2-(1,3-Dioxoisoindol-2-yl)-N-[4-methyl-3-(2-oxopyrrolidin-1-yl)phenyl]acetamide
CAS 922926-72-5C21H19N3O4
![N-(2-Methyl-4-nitrophenyl)-1-[(3-methylphenyl)methyl]-6-oxopyridine-3-carboxamide chemical structure, C21H19N3O4, CAS 942009-44-1](/s/WUGMQYZHMCGYCJ-UHFFFAOYSA-N.svg)
N-(2-Methyl-4-nitrophenyl)-1-[(3-methylphenyl)methyl]-6-oxopyridine-3-carboxamide
CAS 942009-44-1C21H19N3O4
![2-[(2E)-2-(2,3-Dimethoxybenzylidene)hydrazino]-N-(1-naphthyl)-2-oxoacetamide chemical structure, C21H19N3O4, CAS 331426-39-2](/s/FJVRDIFTMHZLDR-LPYMAVHISA-N.svg)
2-[(2E)-2-(2,3-Dimethoxybenzylidene)hydrazino]-N-(1-naphthyl)-2-oxoacetamide
CAS 331426-39-2C21H19N3O4
![3,4-Dimethoxy-N-[2-(pyridin-2-ylcarbamoyl)phenyl]benzamide chemical structure, C21H19N3O4, CAS 499198-51-5](/s/PKGDWSYKKAZKGU-UHFFFAOYSA-N.svg)
3,4-Dimethoxy-N-[2-(pyridin-2-ylcarbamoyl)phenyl]benzamide
CAS 499198-51-5C21H19N3O4
![4-(Benzo[d][1,3]dioxol-5-yl)-6-phenethyl-3,4,6,7-tetrahydro-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione chemical structure, C21H19N3O4, CAS 946219-17-6](/s/FUUGHTCWGMGUHQ-UHFFFAOYSA-N.svg)
4-(Benzo[d][1,3]dioxol-5-yl)-6-phenethyl-3,4,6,7-tetrahydro-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione
CAS 946219-17-6C21H19N3O4
N-(1H-Benzimidazol-2-yl)-2-(5-methoxy-4,7-dimethyl-2-oxo-2H-chromen-3-yl)acetamide
CAS 920436-23-3C21H19N3O4
N-(3,4-Dimethylphenyl)-1-(3-nitrobenzyl)-6-oxo-1,6-dihydropyridine-3-carboxamide
CAS 899741-57-2C21H19N3O4
N-(3,5-Dimethylphenyl)-1-(3-nitrobenzyl)-6-oxo-1,6-dihydropyridine-3-carboxamide
CAS 899970-55-9C21H19N3O4
2-(1,3-Dioxoisoindolin-2-yl)-N-(1-ethyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)acetamide
CAS 922130-26-5C21H19N3O4
- N-(1H-Indol-6-yl)-2-(3-methoxypropyl)-1,3-dioxo-2,3-dihydro-1H-isoindole-5-carboxamide1144436-79-2C21H19N3O4
- 6-(Furan-2-yl)-2-[2-(5-methoxy-1,2-dimethyl-1H-indol-3-yl)-2-oxoethyl]pyridazin-3(2H)-one1219543-14-2C21H19N3O4
- N-(1,3-Benzodioxol-5-yl)-2-(10-oxo-3,4,5,10-tetrahydrobenzo[b][1,6]naphthyridin-2(1H)-yl)acetamide1251580-92-3C21H19N3O4
- 3-(3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)-1-ethylquinolin-4(1H)-one1260748-48-8C21H19N3O4
- 3-(3-(2,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)-1-ethylquinolin-4(1H)-one1358956-88-3C21H19N3O4
- N-(1-Oxo-1,3-dihydro-2-benzofuran-5-yl)-2-[4-oxo-3-(propan-2-yl)-3,4-dihydrophthalazin-1-yl]acetamide1574529-00-2C21H19N3O4
- (3-(3-Benzyl-1,2,4-oxadiazol-5-yl)azetidin-1-yl)(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanone1351631-46-3C21H19N3O4
- N-[(1-Methyl-1H-benzimidazol-2-yl)methyl]-2-[(4-methyl-2-oxo-2H-chromen-7-yl)oxy]acetamide1574345-46-2C21H19N3O4
- 2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-(1-methyl-1H-imidazol-5-yl)acetic acid1699973-62-0C21H19N3O4
- 1-[2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)ethyl]-1H-imidazole-5-carboxylic acid2091267-83-1C21H19N3O4
- 3-(3-(4-Ethoxy-3-methoxyphenyl)-1,2,4-oxadiazol-5-yl)-6-methylquinolin-4(1H)-one1260743-97-2C21H19N3O4
- 4-Amino-2-(3,4-diethoxyphenyl)-5H-[1]benzopyrano[4,3-d]pyrimidin-5-one32644-56-7C21H19N3O4
- N-[5-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1,3,4-oxadiazol-2-yl]-5,6,7,8-tetrahydronaphthalene-2-carboxamide862808-53-5C21H19N3O4
- N-(1-Acetyl-1,2,3,4-tetrahydroquinolin-6-yl)-2-(1,3-dioxoisoindolin-2-yl)acetamide932502-06-2C21H19N3O4
- N-(2-Methyl-4-nitrophenyl)-1-(2-methylbenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941902-99-4C21H19N3O4
- N-(2-Methyl-5-nitrophenyl)-1-(2-methylbenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941909-31-5C21H19N3O4
- 1-(2,5-Dimethylbenzyl)-N-(3-nitrophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941952-64-3C21H19N3O4
- 1-(2,5-Dimethylbenzyl)-N-(4-nitrophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941909-81-5C21H19N3O4
- N-(2-Ethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941953-16-8C21H19N3O4
- N-(2,3-Dimethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide899970-06-0C21H19N3O4
- N-(2,4-Dimethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide900009-45-2C21H19N3O4
- N-(2,5-Dimethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide899740-89-7C21H19N3O4
- N-(3,4-Dimethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941953-25-9C21H19N3O4
- N-(2,6-Dimethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide941904-23-0C21H19N3O4
- N-(3,5-Dimethylphenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide899970-09-3C21H19N3O4
- N-Ethyl-1-(3-nitrobenzyl)-2-oxo-N-phenyl-1,2-dihydropyridine-3-carboxamide941904-38-7C21H19N3O4
- N-(4-Acetylphenyl)-2-(3-(4-methoxyphenyl)-6-oxopyridazin-1(6H)-yl)acetamide922973-50-0C21H19N3O4
- N-(4-Acetylphenyl)-2-(3-(3-methoxyphenyl)-6-oxopyridazin-1(6H)-yl)acetamide922995-39-9C21H19N3O4
- N-(3-Acetylphenyl)-4-methoxy-1-(2-methylphenyl)-6-oxo-1,6-dihydropyridazine-3-carboxamide1002255-03-9C21H19N3O4
- N-(2-Ethylphenyl)-1-[(3-nitrophenyl)methyl]-6-oxopyridine-3-carboxamide941885-18-3C21H19N3O4
- N-(2,6-Dimethylphenyl)-1-[(3-nitrophenyl)methyl]-6-oxopyridine-3-carboxamide941973-82-6C21H19N3O4
- 3-Methyl-N-[4-(4-propoxyphenyl)-1,2,5-oxadiazol-3-yl]-1-benzofuran-2-carboxamide898606-57-0C21H19N3O4
- Ethyl 4-benzamido-6-oxo-1-(o-tolyl)-1,6-dihydropyridazine-3-carboxylate941974-37-4C21H19N3O4
- N-(2,3-Dimethylphenyl)-1-(3-nitrobenzyl)-6-oxo-1,6-dihydropyridine-3-carboxamide899741-55-0C21H19N3O4
- N-(2,4-Dimethylphenyl)-1-(3-nitrobenzyl)-6-oxo-1,6-dihydropyridine-3-carboxamide899970-54-8C21H19N3O4
- N-(2,5-Dimethylphenyl)-1-(3-nitrobenzyl)-6-oxo-1,6-dihydropyridine-3-carboxamide900010-17-5C21H19N3O4
- N-[4-(5,6,7,8-Tetrahydronaphthalen-2-yl)-1,2,5-oxadiazol-3-yl]-2,3-dihydro-1,4-benzodioxine-2-carboxamide941478-78-0C21H19N3O4
- N-[(2H-1,3-Benzodioxol-5-yl)methyl]-2-[4-(4-methylphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]acetamide1060201-92-4C21H19N3O4
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-[4-(4-methylphenyl)-6-oxo-1,6-dihydropyrimidin-1-yl]acetamide1058485-41-8C21H19N3O4
- 2-(Benzo[d][1,3]dioxol-5-yl)-N-(5-(5,6,7,8-tetrahydronaphthalen-2-yl)-1,3,4-oxadiazol-2-yl)acetamide922066-88-4C21H19N3O4
- 2-(2-Hydroxyethyl)-8-(4-methoxybenzyl)pyrido[4,3-b][1,6]naphthyridine-1,9(2H,8H)-dione1158331-99-7C21H19N3O4
- 3-(1,3-Dioxoisoindolin-2-yl)-N-(5-oxo-1-phenylpyrrolidin-3-yl)propanamide896363-64-7C21H19N3O4
- Methyl 2-(1-(4-methylbenzyl)-6-oxo-1,6-dihydropyridazine-3-carboxamido)benzoate1049503-42-5C21H19N3O4
- 3-[4-[(2,4-Dimethoxyphenyl)methoxy]-1,3-benzoxazol-2-yl]pyridin-2-amine1146951-17-8C21H19N3O4
- N-(2-Hydroxyethyl)-2-[2-(1H-indol-3-yl)ethyl]-1,3-dioxo-2,3-dihydro-1H-isoindole-5-carboxamide1190246-79-7C21H19N3O4
- 2-((1-(7-Methoxybenzofuran-2-carbonyl)piperidin-4-yl)oxy)nicotinonitrile1797224-82-8C21H19N3O4
- 2-(4-Acetylphenoxy)-N-(2-(1-methyl-6-oxo-1,6-dihydropyridazin-3-yl)phenyl)acetamide1428349-79-4C21H19N3O4
- (E)-3-(Benzo[d][1,3]dioxol-5-yl)-N-(4-oxo-1,2,3,3a,4,5-hexahydropyrrolo[1,2-a]quinoxalin-2-yl)acrylamide2034752-41-3C21H19N3O4
- Benzo[d][1,3]dioxol-5-yl(4-(quinoxalin-2-yloxy)piperidin-1-yl)methanone1705903-64-5C21H19N3O4
- N-([2,4'-Bipyridin]-3-ylmethyl)-2-(benzo[d][1,3]dioxol-5-yloxy)propanamide2034432-82-9C21H19N3O4
- (R)-2-(((9H-Fluoren-9-yl)methoxy)carbonylamino)-3-(1H-imidazol-1-yl)propanoic acid1217735-06-2C21H19N3O4
- (S)-2-(((9H-Fluoren-9-yl)methoxy)carbonylamino)-3-(1H-imidazol-1-yl)propanoic acid1217687-87-0C21H19N3O4
- 2-(2H-1,3-Benzodioxol-5-yloxy)-N-({[2,3'-bipyridine]-4-yl}methyl)propanamide1903169-37-8C21H19N3O4
- 1-(3-(1,2,4-Oxadiazol-3-yl)-4-phenylpyrrolidin-1-yl)-2-(benzo[d][1,3]dioxol-5-yl)ethanone2034286-12-7C21H19N3O4
- (3-(1,2,4-Oxadiazol-3-yl)-4-phenylpyrrolidin-1-yl)(2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanone2034350-41-7C21H19N3O4
- N-{2-[4-(Furan-2-yl)-3,5-dimethyl-1H-pyrazol-1-yl]ethyl}-4-oxo-4H-chromene-2-carboxamide2034552-51-5C21H19N3O4
- N-(2-(4-(Furan-2-yl)-3,5-dimethyl-1H-pyrazol-1-yl)ethyl)-2-oxo-2H-chromene-3-carboxamide2034552-65-1C21H19N3O4
- 3-(1,3-Benzodioxol-5-yl)-N-(2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)-2-propenamide326907-44-2C21H19N3O4
- N-[[3-(4-Methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-N-prop-2-enyl-1,3-benzodioxole-5-carboxamide887597-78-6C21H19N3O4
- 3-Methyl-N-{4-[4-(propan-2-yloxy)phenyl]-1,2,5-oxadiazol-3-yl}-1-benzofuran-2-carboxamide898606-43-4C21H19N3O4
- Ethyl 4-(4-methylbenzamido)-6-oxo-1-phenyl-1,6-dihydropyridazine-3-carboxylate942009-61-2C21H19N3O4
- Ethyl 4-(3-methylbenzamido)-6-oxo-1-phenyl-1,6-dihydropyridazine-3-carboxylate941974-22-7C21H19N3O4
- Ethyl 4-(2-methylbenzamido)-6-oxo-1-phenyl-1,6-dihydropyridazine-3-carboxylate946363-62-8C21H19N3O4
- 1,3-Benzodioxol-5-yl[4-(1H-indol-2-ylcarbonyl)piperazin-1-yl]methanone951957-08-7C21H19N3O4
- 2-(2-Hydroxyethyl)-8-(2-methoxybenzyl)pyrido[4,3-b][1,6]naphthyridine-1,9(2H,8H)-dione1158281-80-1C21H19N3O4
- 3-(4-Cyanophenyl)-N-(2-(2,4-dioxooxazolidin-3-yl)-1-phenylethyl)propanamide2034270-07-8C21H19N3O4
- N-(2-(2,4-Dioxooxazolidin-3-yl)-1-phenylethyl)-2-(1H-indol-3-yl)acetamide2034546-43-3C21H19N3O4
- 4-[[(Z)-2-Cyano-3-(4-morpholin-4-ylphenyl)prop-2-enoyl]amino]benzoic acid1808370-55-9C21H19N3O4
- Methyl 4-[3-(5-phenyl-1,2,4-oxadiazol-3-yl)pyrrolidine-1-carbonyl]benzoate2034285-63-5C21H19N3O4
- Methyl 2-[3-(1,2,4-oxadiazol-3-yl)-4-phenylpyrrolidine-1-carbonyl]benzoate2034285-89-5C21H19N3O4
- Methyl 4-[3-(quinoxalin-2-yloxy)pyrrolidine-1-carbonyl]benzoate2097933-09-8C21H19N3O4
- 2-(2H-1,3-Benzodioxol-5-yl)-1-[3-(quinoxalin-2-yloxy)pyrrolidin-1-yl]ethan-1-one2097887-99-3C21H19N3O4
- 3-[(9H-Fluoren-9-ylmethoxycarbonylamino)methyl]-1-methylpyrazole-4-carboxylic acid2138027-90-2C21H19N3O4
- 4-(4-Cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,6-naphthyridine-3-carboxylic acid3046141-69-6C21H19N3O4
- Methyl 3-[2-(1H-benzoimidazol-1-yl)-4-(4-methoxyphenyl)-5-oxazolyl]propionate595597-14-1C21H19N3O4
- 4-Nitro-N-[6-(2-propan-2-ylphenoxy)-3-pyridinyl]benzamide224794-83-6C21H19N3O4
Frequently asked questions
What is the molar mass of C21H19N3O4?
The molar mass of C21H19N3O4 is 377.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 19 hydrogen atoms, 3 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 377.1376 Da.
How many compounds have the formula C21H19N3O4?
CompoundList lists 263 compounds with the molecular formula C21H19N3O4, including 2-Ethoxy-N-(1-(furan-2-carbonyl)indolin-6-yl)nicotinamide, (4-(Furan-2-carbonyl)piperazin-1-yl)(3-(pyridin-2-yloxy)phenyl)methanone, 2-(1-(5-Phenylisoxazole-3-carbonyl)azetidin-3-yl)-3a,4,7,7a-tetrahydro-1H-isoindole-1,3(2H)-dione. 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 C21H19N3O4?
C21H19N3O4 has a degree of unsaturation of 14. 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.