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Molecular formula

C21H18N4O

123 compounds have this formula on CompoundList.

Molar mass
342.40g/mol
Monoisotopic mass
342.1481Da
Atoms
44
Elements
4
Rings plus double bonds
15

The formula C21H18N4O describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 1 oxygen atom. 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 × 2173.67%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 185.30%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 416.36%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 14.67%
    15.999 × 1 = 15.999 g/mol
Look up another formula

Compounds with the formula C21H18N4O

Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.

Showing 101 to 123 of 123 compounds

5-(Diphenylmethyl)-1-(4-methoxyphenyl)-1H-tetrazole chemical structure, C21H18N4O, CAS 72306-38-8
5-(Diphenylmethyl)-1-(4-methoxyphenyl)-1H-tetrazole
CAS 72306-38-8C21H18N4O
5-Ethyl-N-(1-naphthyl)-1-phenyl-1H-1,2,3-triazole-4-carboxamide chemical structure, C21H18N4O, CAS 927639-06-3
5-Ethyl-N-(1-naphthyl)-1-phenyl-1H-1,2,3-triazole-4-carboxamide
CAS 927639-06-3C21H18N4O
2-Methyl-N-(4-(7-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)benzamide chemical structure, C21H18N4O, CAS 923233-52-7
2-Methyl-N-(4-(7-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)benzamide
CAS 923233-52-7C21H18N4O
N-Cyclopropyl-3-(4-phenoxyphenyl)imidazo[1,2-a]pyrazin-8-amine chemical structure, C21H18N4O, CAS 787591-25-7
N-Cyclopropyl-3-(4-phenoxyphenyl)imidazo[1,2-a]pyrazin-8-amine
CAS 787591-25-7C21H18N4O
1-[1-Isopropyl-7-(7H-pyrrolo[2,3-d]pyrimidin-4-ylethynyl)-1H-indol-3-yl]-ethanone chemical structure, C21H18N4O, CAS 1147014-73-0
1-[1-Isopropyl-7-(7H-pyrrolo[2,3-d]pyrimidin-4-ylethynyl)-1H-indol-3-yl]-ethanone
CAS 1147014-73-0C21H18N4O
N-(3-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-3,4-dimethylbenzamide chemical structure, C21H18N4O, CAS 863020-09-1
N-(3-(Imidazo[1,2-a]pyrimidin-2-yl)phenyl)-3,4-dimethylbenzamide
CAS 863020-09-1C21H18N4O
3-Methyl-N-[5-(1H-pyrrolo[2,3-b]pyridin-3-ylmethyl)-pyridin-2-yl]-benzamide chemical structure, C21H18N4O, CAS 1029046-47-6
3-Methyl-N-[5-(1H-pyrrolo[2,3-b]pyridin-3-ylmethyl)-pyridin-2-yl]-benzamide
CAS 1029046-47-6C21H18N4O
2-Methyl-6-((4-(4-(pyridin-4-yl)-1H-pyrazol-3-yl)phenoxy)methyl)pyridine chemical structure, C21H18N4O, CAS 1301167-62-3
2-Methyl-6-((4-(4-(pyridin-4-yl)-1H-pyrazol-3-yl)phenoxy)methyl)pyridine
CAS 1301167-62-3C21H18N4O
N-[4'-(2-Amino-1H-benzimidazol-1-yl)[1,1'-biphenyl]-2-yl]acetamide chemical structure, C21H18N4O, CAS 1352874-25-9
N-[4'-(2-Amino-1H-benzimidazol-1-yl)[1,1'-biphenyl]-2-yl]acetamide
CAS 1352874-25-9C21H18N4O
N-[6-(4-Ethoxyphenyl)-4-pyrimidinyl]-5-isoquinolinamine chemical structure, C21H18N4O, CAS 697740-45-7
N-[6-(4-Ethoxyphenyl)-4-pyrimidinyl]-5-isoquinolinamine
CAS 697740-45-7C21H18N4O
1-[4-Methyl-6-[1-(6-methyl-2-pyridinyl)-1H-indazol-6-yl]-2-pyridinyl]ethanone chemical structure, C21H18N4O, CAS 1864772-59-7
1-[4-Methyl-6-[1-(6-methyl-2-pyridinyl)-1H-indazol-6-yl]-2-pyridinyl]ethanone
CAS 1864772-59-7C21H18N4O
3,5-Dihydro-5,5-diphenyl-2-[(4-pyridinylmethyl)amino]-4H-imidazol-4-one chemical structure, C21H18N4O, CAS 78468-74-3
3,5-Dihydro-5,5-diphenyl-2-[(4-pyridinylmethyl)amino]-4H-imidazol-4-one
CAS 78468-74-3C21H18N4O
3-[3-(2-Cyclopropyl-1H-1,3-benzodiazol-1-yl)azetidine-1-carbonyl]benzonitrile chemical structure, C21H18N4O, CAS 2379995-86-3
3-[3-(2-Cyclopropyl-1H-1,3-benzodiazol-1-yl)azetidine-1-carbonyl]benzonitrile
CAS 2379995-86-3C21H18N4O
2-Cyano-3-[3-(4-ethylphenyl)-1-phenyl-1H-pyrazol-4-yl]prop-2-enamide chemical structure, C21H18N4O
2-Cyano-3-[3-(4-ethylphenyl)-1-phenyl-1H-pyrazol-4-yl]prop-2-enamide
C21H18N4O
6-Amino-4-(2,4-dimethylphenyl)-3-phenyl-2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile chemical structure, C21H18N4O, CAS 665001-25-2
6-Amino-4-(2,4-dimethylphenyl)-3-phenyl-2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
CAS 665001-25-2C21H18N4O
4-(2-(6-Methoxypyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinoline chemical structure, C21H18N4O, CAS 476476-03-6
4-(2-(6-Methoxypyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinoline
CAS 476476-03-6C21H18N4O
N',2-Dibenzylidene-N-phenylhydrazine-1-carbohydrazide chemical structure, C21H18N4O, CAS 121649-21-6
N',2-Dibenzylidene-N-phenylhydrazine-1-carbohydrazide
CAS 121649-21-6C21H18N4O
4-[(E)-(9-Ethyl-9H-carbazol-3-yl)diazenyl]benzamide chemical structure, C21H18N4O, CAS 185012-10-6
4-[(E)-(9-Ethyl-9H-carbazol-3-yl)diazenyl]benzamide
CAS 185012-10-6C21H18N4O
4-(2-(6-Methylpyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinolin-7-ol chemical structure, C21H18N4O, CAS 476477-67-5
4-(2-(6-Methylpyridin-2-yl)-5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)quinolin-7-ol
CAS 476477-67-5C21H18N4O
6-[4-(Benzylideneamino)-5-phenyl-1,2,4-triazolidin-3-ylidene]cyclohexa-2,4-dien-1-one chemical structure, C21H18N4O, CAS 62758-65-0
6-[4-(Benzylideneamino)-5-phenyl-1,2,4-triazolidin-3-ylidene]cyclohexa-2,4-dien-1-one
CAS 62758-65-0C21H18N4O
2-(1H-Indol-1-yl)-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one chemical structure, C21H18N4O, CAS 2770604-15-2
2-(1H-Indol-1-yl)-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one
CAS 2770604-15-2C21H18N4O
4-(3-Oxo-3-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}propyl)benzonitrile chemical structure, C21H18N4O, CAS 2770607-82-2
4-(3-Oxo-3-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}propyl)benzonitrile
CAS 2770607-82-2C21H18N4O
2-(1H-Indol-3-yl)-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one chemical structure, C21H18N4O, CAS 2770619-99-1
2-(1H-Indol-3-yl)-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one
CAS 2770619-99-1C21H18N4O

Frequently asked questions

What is the molar mass of C21H18N4O?

The molar mass of C21H18N4O is 342.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 342.1481 Da.

How many compounds have the formula C21H18N4O?

CompoundList lists 123 compounds with the molecular formula C21H18N4O, including 5-(Diphenylmethyl)-1-(4-methoxyphenyl)-1H-tetrazole, 5-Ethyl-N-(1-naphthyl)-1-phenyl-1H-1,2,3-triazole-4-carboxamide, 2-Methyl-N-(4-(7-methylimidazo[1,2-a]pyrimidin-2-yl)phenyl)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 C21H18N4O?

C21H18N4O 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.