Molecular formula
C21H16N4O2
72 compounds have this formula on CompoundList.
- Molar mass
- 356.38g/mol
- Monoisotopic mass
- 356.1273Da
- Atoms
- 43
- Elements
- 4
- Rings plus double bonds
- 16
The formula C21H16N4O2 describes a molecule made of 21 carbon atoms, 16 hydrogen atoms, 4 nitrogen atoms and 2 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 × 2170.77%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 164.53%1.008 × 16 = 16.128 g/mol
- N Nitrogen × 415.72%14.007 × 4 = 56.028 g/mol
- O Oxygen × 28.98%15.999 × 2 = 31.998 g/mol
Look up another formula
Compounds with the formula C21H16N4O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 72 of 72 compounds
HZ-166
CAS 612527-56-7C21H16N4O2
![N-[(Z)-(1-Benzyl-2-oxo-indolin-3-ylidene)amino]pyridine-4-carboxamide chemical structure, C21H16N4O2, CAS 1334814-23-1](/s/OUVPUWNLMGCFKD-UHFFFAOYSA-N.svg)
N-[(Z)-(1-Benzyl-2-oxo-indolin-3-ylidene)amino]pyridine-4-carboxamide
CAS 1334814-23-1C21H16N4O2
4-((4-(4-Hydroxyphenyl)phthalazin-1-yl)amino)benzamide
CAS 487025-40-1C21H16N4O2
(Rac)-PF-06256142
CAS 1609583-14-3C21H16N4O2
![Methyl 4-[(2-pyridin-4-ylquinazolin-4-yl)amino]benzoate chemical structure, C21H16N4O2, CAS 381703-10-2](/s/XEQMASPGYDXRCR-UHFFFAOYSA-N.svg)
Methyl 4-[(2-pyridin-4-ylquinazolin-4-yl)amino]benzoate
CAS 381703-10-2C21H16N4O2
![N-[3-(2-Pyridin-2-ylquinazolin-4-yl)oxyphenyl]acetamide chemical structure, C21H16N4O2, CAS 799837-10-8](/s/KVIZOTQMWXNPLW-UHFFFAOYSA-N.svg)
N-[3-(2-Pyridin-2-ylquinazolin-4-yl)oxyphenyl]acetamide
CAS 799837-10-8C21H16N4O2
(E)-N'-(2-Hydroxybenzylidene)-3-(naphthalen-1-yl)-1H-pyrazole-5-carbohydrazide
CAS 402604-06-2C21H16N4O2
(E)-N'-(4-Hydroxybenzylidene)-3-(naphthalen-1-yl)-1H-pyrazole-5-carbohydrazide
CAS 634888-13-4C21H16N4O2
![N-[4-(2-Pyridin-2-ylquinazolin-4-yl)oxyphenyl]acetamide chemical structure, C21H16N4O2, CAS 578748-01-3](/s/SEZFJMCZHKZYGA-UHFFFAOYSA-N.svg)
N-[4-(2-Pyridin-2-ylquinazolin-4-yl)oxyphenyl]acetamide
CAS 578748-01-3C21H16N4O2
![N'-[(5-Methyl-2-furyl)methylene]-2-(4-pyridinyl)-4-quinolinecarbohydrazide chemical structure, C21H16N4O2, CAS 402852-69-1](/s/PVWHFHMOORRRTM-YDZHTSKRSA-N.svg)
N'-[(5-Methyl-2-furyl)methylene]-2-(4-pyridinyl)-4-quinolinecarbohydrazide
CAS 402852-69-1C21H16N4O2
2-(1-Oxo-4-phenylphthalazin-2-yl)-N-pyridin-2-ylacetamide
CAS 364612-61-3C21H16N4O2
3-Nitro-1-(triphenylmethyl)-1H-1,2,4-triazole
CAS 935760-23-9C21H16N4O2
2-Ethoxy-4-(1H-imidazo(4,5-B)phenazin-2-yl)phenol
CAS 114991-91-2C21H16N4O2
2-(3,4-Dimethoxyphenyl)-1H-imidazo(4,5-B)phenazine
CAS 114991-88-7C21H16N4O2
2-(2-(1H-Indol-3-ylmethylene)hydrazino)-N-(1-naphthyl)-2-oxoacetamide
CAS 880051-42-3C21H16N4O2
(E)-N'-(4-Hydroxybenzylidene)-3-(naphthalen-2-yl)-1H-pyrazole-5-carbohydrazide
CAS 1285525-48-5C21H16N4O2
Methyl 4-(4-(3-(pyridin-2-yl)-1H-pyrazol-4-yl)pyridin-2-yl)benzoate
CAS 886444-10-6C21H16N4O2
![4-(3-Methyl-4-(2-methyl-1H-imidazo[4,5-C]pyridin-1-yl)phenoxy)furo[3,2-C]pyridine chemical structure, C21H16N4O2, CAS 1609577-11-8](/s/VNGSAFKJOYCSHN-UHFFFAOYSA-N.svg)
4-(3-Methyl-4-(2-methyl-1H-imidazo[4,5-C]pyridin-1-yl)phenoxy)furo[3,2-C]pyridine
CAS 1609577-11-8C21H16N4O2
1-Benzyl-2-oxo-N-(pyridin-4-yl)-1,2-dihydro-1,8-naphthyridine-3-carboxamide
CAS 946330-77-4C21H16N4O2
![6-Methyl-N-[(E)-4-quinolylmethyleneamino]-[1,3]dioxolo[4,5-g]quinolin-8-amine chemical structure, C21H16N4O2, CAS 91919-10-7](/s/CTQCNYFFHNAUQF-FOKLQQMPSA-N.svg)
6-Methyl-N-[(E)-4-quinolylmethyleneamino]-[1,3]dioxolo[4,5-g]quinolin-8-amine
CAS 91919-10-7C21H16N4O2
Alantrypinene B
CAS 853245-38-2C21H16N4O2
![5-[(3-Cyanobenzoyl)amino]-2-methyl-n-pyridin-3-ylbenzamide chemical structure, C21H16N4O2, CAS 896156-64-2](/s/OOQSNMCXBVUVRG-UHFFFAOYSA-N.svg)
5-[(3-Cyanobenzoyl)amino]-2-methyl-n-pyridin-3-ylbenzamide
CAS 896156-64-2C21H16N4O2
![7,9-Dimethyl-11-phenylpyrimido[4',5':3,4]pyrrolo[1,2-a]quinoxaline-8,10(7H,9H)-dione chemical structure, C21H16N4O2, CAS 577984-16-8](/s/YVZVATKCIBNZNI-UHFFFAOYSA-N.svg)
7,9-Dimethyl-11-phenylpyrimido[4',5':3,4]pyrrolo[1,2-a]quinoxaline-8,10(7H,9H)-dione
CAS 577984-16-8C21H16N4O2
2-(3-Methoxyphenyl)-N-(pyrimidin-2-yl)quinoline-4-carboxamide
CAS 352676-83-6C21H16N4O2
- N-[(Z)-(1-Benzyl-2-oxoindol-3-ylidene)amino]pyridine-3-carboxamide341984-24-5C21H16N4O2
- 4-{4-[(4-Hydroxyphenyl)amino]phthalazin-1-yl}benzamide364597-81-9C21H16N4O2
- (E)-N'-((2-Hydroxynaphthalen-1-yl)methylene)-3-phenyl-1H-pyrazole-5-carbohydrazide1284273-96-6C21H16N4O2
- 3-[1-(4-Methylbenzoyl)-1H-pyrazol-3-yl]-1-phenyl-4(1H)-pyridazinone318497-97-1C21H16N4O2
- (3-Methylphenyl){3-[4-(2-pyrimidinyloxy)phenyl]-1H-pyrazol-1-yl}methanone321998-89-4C21H16N4O2
- 6,7-Bis(4-methoxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carbonitrile632361-67-2C21H16N4O2
- Phenyl{4-[(1-phenyl-1H-tetrazol-5-yl)methoxy]phenyl}methanone898653-07-1C21H16N4O2
- (7,8-Dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)(3-phenylbenzo[c]isoxazol-5-yl)methanone1798040-44-4C21H16N4O2
- 4,6-Diphenoxy-N-phenyl-1,3,5-triazin-2-amine1973-08-6C21H16N4O2
- N-[3-(1-Methyl-6-oxo-1,6-dihydropyridazin-3-yl)phenyl]quinoline-2-carboxamide941979-77-7C21H16N4O2
- N-(4-(1-Methyl-6-oxo-1,6-dihydropyridazin-3-yl)phenyl)quinoline-2-carboxamide941979-92-6C21H16N4O2
- 2-Phenyl-N-{2-[3-(2-pyridinyl)-1,2,4-oxadiazol-5-yl]phenyl}acetamide1119498-57-5C21H16N4O2
- N-[2-(3-Benzyl-1,2,4-oxadiazol-5-yl)phenyl]pyridine-3-carboxamide1119498-84-8C21H16N4O2
- N-(2-Methylpyrazolo[1,5-a]pyrimidin-6-yl)-9H-xanthene-9-carboxamide1797679-91-4C21H16N4O2
- (E)-2-Cyano-3-(4-methoxyphenyl)-N,N-dipyridin-2-ylprop-2-enamide326616-80-2C21H16N4O2
- N,N'-di-Quinolin-8-yl-malonamide157582-11-1C21H16N4O2
- 4-(4-Oxo-2-phenylquinazolin-3(4H)-yl)benzohydrazide148321-04-4C21H16N4O2
- 2-Phenyl-N-(2-(3-(pyridin-3-yl)-1,2,4-oxadiazol-5-yl)phenyl)acetamide1119400-21-3C21H16N4O2
- 2-Phenyl-N-(2-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)phenyl)acetamide1120234-07-2C21H16N4O2
- 4-Oxo-3-phenyl-N-(pyridin-3-ylmethyl)-3,4-dihydroquinazoline-7-carboxamide1144487-92-2C21H16N4O2
- 4-Oxo-3-phenyl-N-(pyridin-2-ylmethyl)-3,4-dihydroquinazoline-7-carboxamide1144432-72-3C21H16N4O2
- 2-(3-(Naphthalen-2-yl)-6-oxopyridazin-1(6H)-yl)-N-(pyridin-4-yl)acetamide1282120-95-9C21H16N4O2
- N-([2,4'-Bipyridin]-3-ylmethyl)-5-phenylisoxazole-3-carboxamide2034432-49-8C21H16N4O2
- 1-(Biphenyl-4-yl)-2,5-dihydro-5-oxo-1H-1,2,4-triazole-3-carboxylic acid phenylamide1000575-21-2C21H16N4O2
- 2,2'-(6-Anilino-1,3,5-triazine-2,4-diyl)diphenol1248-66-4C21H16N4O2
- Acetamide, N-[3-(3-benzoylpyrazolo[1,5-a]pyrimidin-7-yl)phenyl]-96605-69-5C21H16N4O2
- N-(4-(7-Oxo-7,8-dihydro-1,8-naphthyridin-4-yl-amino)phenyl)benzamide1203509-61-8C21H16N4O2
- N-(3-(3-Pyridyl)phenyl)-2-nitro-4-(1-pyrrolyl)aniline184173-99-7C21H16N4O2
- 6-(Benzyloxy)-N-(quinolin-6-yl)pyrimidine-4-carboxamide2327827-24-5C21H16N4O2
- 2-({[4-(Phenyldiazenyl)phenyl]amino}methyl)-1H-isoindole-1,3(2H)-dione325806-93-7C21H16N4O2
- Acetamide, 2-(2-cyanophenoxy)-N-[4-[(1E)-2-phenyldiazenyl]phenyl]-1004210-82-5C21H16N4O2
- Acetamide, 2-(4-cyanophenoxy)-N-[4-[(1E)-2-phenyldiazenyl]phenyl]-1001781-58-3C21H16N4O2
- N-(4-Phenoxyphenyl)-6-(1H-pyrazol-1-yl)nicotinamide957499-11-5C21H16N4O2
- Acetamide, 2-(3-cyanophenoxy)-N-[4-(2-phenyldiazenyl)phenyl]-1012220-90-4C21H16N4O2
- 4-[(7-Oxo-8H-1,8-naphthyridin-4-yl)amino]-N-phenylbenzamide1203509-77-6C21H16N4O2
- 1H-Pyrrole-3-carboxylic acid, 2-phenyl-5-[2-(phenylamino)-4-pyrimidinyl]-951784-44-4C21H16N4O2
- N-Phenyl-N'-[3-(1H-pyrrolo[2,3-b]pyridine-3-carbonyl)phenyl]urea918508-37-9C21H16N4O2
- N-[2-[(7-Oxo-8H-1,8-naphthyridin-4-yl)amino]phenyl]benzamide1203509-76-5C21H16N4O2
- 3-[3-[4-(2-Pyridinylamino)phenoxy]-2-pyrazinyl]phenol1231923-17-3C21H16N4O2
- 6-[(2-Amino-4-pyrimidinyl)oxy]-N-phenyl-1-naphthalenecarboxamide861875-62-9C21H16N4O2
- 3-(4-Methylphenyl)-5-(4-nitrophenyl)-4-phenyl-4H-1,2,4-triazole62507-56-6C21H16N4O2
- 3-[(6-Oxocyclohexa-2,4-dien-1-ylidene)(2-phenylhydrazinyl)methyl]quinoxalin-2(1H)-one89569-48-2C21H16N4O2
- 6-(3-(Quinolin-4-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-2-yl)picolinic acid749843-99-0C21H16N4O2
- 3-{4-[(E)-(2-Methylphenyl)diazenyl]phenyl}quinazoline-2,4(1H,3H)-dione921754-22-5C21H16N4O2
- 6-[5-(4-Methoxyphenyl)[2,4'-bipyrimidin]-4(3H)-ylidene]cyclohexa-2,4-dien-1-one923594-16-5C21H16N4O2
- 1-[3-(2-Azatricyclo[10.4.0.04,9]hexadeca-1(16),4,6,8,12,14-hexaen-10-yn-2-yl)-3-oxopropyl]triazole-4-carbaldehyde2484964-97-6C21H16N4O2
- 2-[4-(4-Methoxyphenyl)-6-(2-pyridinyl)-1,3,5-triazin-2-yl]phenol2378606-80-3C21H16N4O2
- 3-[N-Anilino-C-(2-hydroxyphenyl)carbonimidoyl]-1H-quinoxalin-2-oneC21H16N4O2
Frequently asked questions
What is the molar mass of C21H16N4O2?
The molar mass of C21H16N4O2 is 356.38 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms, 4 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 356.1273 Da.
How many compounds have the formula C21H16N4O2?
CompoundList lists 72 compounds with the molecular formula C21H16N4O2, including HZ-166, N-[(Z)-(1-Benzyl-2-oxo-indolin-3-ylidene)amino]pyridine-4-carboxamide, 4-((4-(4-Hydroxyphenyl)phthalazin-1-yl)amino)benzamide. 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 C21H16N4O2?
C21H16N4O2 has a degree of unsaturation of 16. 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.