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Molecular formula

C21H17N5O

34 compounds have this formula on CompoundList.

Molar mass
355.40g/mol
Monoisotopic mass
355.1433Da
Atoms
44
Elements
4
Rings plus double bonds
16

The formula C21H17N5O describes a molecule made of 21 carbon atoms, 17 hydrogen atoms, 5 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 × 2170.97%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 174.82%
    1.008 × 17 = 17.136 g/mol
  • N Nitrogen × 519.71%
    14.007 × 5 = 70.035 g/mol
  • O Oxygen × 14.50%
    15.999 × 1 = 15.999 g/mol
Look up another formula

Compounds with the formula C21H17N5O

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

Showing 1 to 34 of 34 compounds

2-Amino-1'-methyl-2'-oxospiro[4a,5,6,7-tetrahydronaphthalene-4,3'-indole]-1,3,3-tricarbonitrile chemical structure, C21H17N5O, CAS 445223-06-3
2-Amino-1'-methyl-2'-oxospiro[4a,5,6,7-tetrahydronaphthalene-4,3'-indole]-1,3,3-tricarbonitrile
CAS 445223-06-3C21H17N5O
2,2-Diphenyl-N-[4-(1H-tetrazol-1-yl)phenyl]acetamide chemical structure, C21H17N5O, CAS 851891-01-5
2,2-Diphenyl-N-[4-(1H-tetrazol-1-yl)phenyl]acetamide
CAS 851891-01-5C21H17N5O
N-(3-Cyanopyrimido(1,2-A)benzimidazol-2-yl)-4-isopropylbenzamide chemical structure, C21H17N5O, CAS 116477-93-1
N-(3-Cyanopyrimido(1,2-A)benzimidazol-2-yl)-4-isopropylbenzamide
CAS 116477-93-1C21H17N5O
Ko-947 chemical structure, C21H17N5O, CAS 1695533-89-1
Ko-947
CAS 1695533-89-1C21H17N5O
4-(3-Phenoxyphenyl)-1,4-dihydro[1,3,5]triazino[1,2-a]benzimidazol-2-amine chemical structure, C21H17N5O, CAS 325730-36-7
4-(3-Phenoxyphenyl)-1,4-dihydro[1,3,5]triazino[1,2-a]benzimidazol-2-amine
CAS 325730-36-7C21H17N5O
N-[4-[(4-Cyano-3-methylpyrido[1,2-a]benzimidazol-1-yl)amino]phenyl]acetamide chemical structure, C21H17N5O, CAS 305331-63-9
N-[4-[(4-Cyano-3-methylpyrido[1,2-a]benzimidazol-1-yl)amino]phenyl]acetamide
CAS 305331-63-9C21H17N5O
2,6-Bis(1-methyl-1H-benzimidazol-2-yl)pyridin-4(1H)-one chemical structure, C21H17N5O, CAS 533928-74-4
2,6-Bis(1-methyl-1H-benzimidazol-2-yl)pyridin-4(1H)-one
CAS 533928-74-4C21H17N5O
2-Imino-10-methyl-1-[(4-methylphenyl)methyl]-5-oxodipyrido[3,4-c:1',2'-f]pyrimidine-3-carbonitrile chemical structure, C21H17N5O, CAS 608104-28-5
2-Imino-10-methyl-1-[(4-methylphenyl)methyl]-5-oxodipyrido[3,4-c:1',2'-f]pyrimidine-3-carbonitrile
CAS 608104-28-5C21H17N5O
{3,5-Dimethyl-4-[(E)-(naphthalen-1-yl)diazenyl]-1H-pyrazol-1-yl}(pyridin-4-yl)methanone chemical structure, C21H17N5O, CAS 75304-78-8
{3,5-Dimethyl-4-[(E)-(naphthalen-1-yl)diazenyl]-1H-pyrazol-1-yl}(pyridin-4-yl)methanone
CAS 75304-78-8C21H17N5O
[1-(4-Methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)-1H-1,2,3-triazol-4-yl](2-naphthyl)methanone chemical structure, C21H17N5O, CAS 860785-20-2
[1-(4-Methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-yl)-1H-1,2,3-triazol-4-yl](2-naphthyl)methanone
CAS 860785-20-2C21H17N5O
N'-[(1-Methyl-1H-pyrrol-2-yl)methylene]-2-(4-pyridinyl)-4-quinolinecarbohydrazide chemical structure, C21H17N5O, CAS 522596-37-8
N'-[(1-Methyl-1H-pyrrol-2-yl)methylene]-2-(4-pyridinyl)-4-quinolinecarbohydrazide
CAS 522596-37-8C21H17N5O
(E)-4-(2-([1,1'-Biphenyl]-4-yl)hydrazono)-3-amino-1-phenyl-1H-pyrazol-5(4H)-one chemical structure, C21H17N5O, CAS 300822-00-8
(E)-4-(2-([1,1'-Biphenyl]-4-yl)hydrazono)-3-amino-1-phenyl-1H-pyrazol-5(4H)-one
CAS 300822-00-8C21H17N5O
6-Amino-4-(4-methoxyphenyl)-3-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile chemical structure, C21H17N5O, CAS 258340-66-8
6-Amino-4-(4-methoxyphenyl)-3-methyl-1-phenyl-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile
CAS 258340-66-8C21H17N5O
[(Z)-(3-Naphthalen-2-yl-1-phenylpyrazol-4-yl)methylideneamino]urea chemical structure, C21H17N5O, CAS 1007193-58-9
[(Z)-(3-Naphthalen-2-yl-1-phenylpyrazol-4-yl)methylideneamino]urea
CAS 1007193-58-9C21H17N5O
N-(2-(1H-Pyrazol-1-yl)pyrimidin-5-yl)-2,2-diphenylacetamide chemical structure, C21H17N5O, CAS 1421462-44-3
N-(2-(1H-Pyrazol-1-yl)pyrimidin-5-yl)-2,2-diphenylacetamide
CAS 1421462-44-3C21H17N5O
N-(2-(1H-Imidazol-1-yl)pyrimidin-5-yl)-2,2-diphenylacetamide chemical structure, C21H17N5O, CAS 1421459-91-7
N-(2-(1H-Imidazol-1-yl)pyrimidin-5-yl)-2,2-diphenylacetamide
CAS 1421459-91-7C21H17N5O
N-(6-(1H-Imidazol-1-yl)pyrimidin-4-yl)-2,2-diphenylacetamide chemical structure, C21H17N5O, CAS 1448131-68-7
N-(6-(1H-Imidazol-1-yl)pyrimidin-4-yl)-2,2-diphenylacetamide
CAS 1448131-68-7C21H17N5O
2,2-Diphenyl-N-[3-(1H-tetrazol-1-yl)phenyl]acetamide chemical structure, C21H17N5O, CAS 883294-49-3
2,2-Diphenyl-N-[3-(1H-tetrazol-1-yl)phenyl]acetamide
CAS 883294-49-3C21H17N5O
(4-Methylphenyl){1-[4-(4-methylphenyl)-2-pyrimidinyl]-1H-1,2,3-triazol-4-yl}methanone chemical structure, C21H17N5O, CAS 882747-54-8
(4-Methylphenyl){1-[4-(4-methylphenyl)-2-pyrimidinyl]-1H-1,2,3-triazol-4-yl}methanone
CAS 882747-54-8C21H17N5O
N-[4-[[3-(4-Pyridinylamino)-2-pyridinyl]oxy]phenyl]-2-pyridinamine chemical structure, C21H17N5O, CAS 1231921-19-9
N-[4-[[3-(4-Pyridinylamino)-2-pyridinyl]oxy]phenyl]-2-pyridinamine
CAS 1231921-19-9C21H17N5O
2-[2-[8-(4-Morpholinyl)imidazo[1,2-b]pyridazin-2-yl]ethynyl]quinoline chemical structure, C21H17N5O, CAS 1639890-42-8
2-[2-[8-(4-Morpholinyl)imidazo[1,2-b]pyridazin-2-yl]ethynyl]quinoline
CAS 1639890-42-8C21H17N5O
2-(1H-Indol-3-yl)-N-(4-methoxyphenyl)imidazo[1,2-a]pyrazin-3-amine chemical structure, C21H17N5O, CAS 879603-65-3
2-(1H-Indol-3-yl)-N-(4-methoxyphenyl)imidazo[1,2-a]pyrazin-3-amine
CAS 879603-65-3C21H17N5O
N-((1-Phenyl-1H-tetrazol-5-yl)methyl)-[1,1'-biphenyl]-4-carboxamide chemical structure, C21H17N5O, CAS 897615-07-5
N-((1-Phenyl-1H-tetrazol-5-yl)methyl)-[1,1'-biphenyl]-4-carboxamide
CAS 897615-07-5C21H17N5O
N-(3-(4-Methyl-4H-1,2,4-triazol-3-yl)phenyl)-2-phenylisonicotinamide chemical structure, C21H17N5O, CAS 1262040-23-2
N-(3-(4-Methyl-4H-1,2,4-triazol-3-yl)phenyl)-2-phenylisonicotinamide
CAS 1262040-23-2C21H17N5O

Frequently asked questions

What is the molar mass of C21H17N5O?

The molar mass of C21H17N5O is 355.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 17 hydrogen atoms, 5 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 355.1433 Da.

How many compounds have the formula C21H17N5O?

CompoundList lists 34 compounds with the molecular formula C21H17N5O, including 2-Amino-1'-methyl-2'-oxospiro[4a,5,6,7-tetrahydronaphthalene-4,3'-indole]-1,3,3-tricarbonitrile, 2,2-Diphenyl-N-[4-(1H-tetrazol-1-yl)phenyl]acetamide, N-(3-Cyanopyrimido(1,2-A)benzimidazol-2-yl)-4-isopropylbenzamide. 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 C21H17N5O?

C21H17N5O 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.