Molecular formula
C21H20N4O
123 compounds have this formula on CompoundList.
- Molar mass
- 344.42g/mol
- Monoisotopic mass
- 344.1637Da
- Atoms
- 46
- Elements
- 4
- Rings plus double bonds
- 14
The formula C21H20N4O describes a molecule made of 21 carbon atoms, 20 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 × 2173.23%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 205.85%1.008 × 20 = 20.160 g/mol
- N Nitrogen × 416.27%14.007 × 4 = 56.028 g/mol
- O Oxygen × 14.65%15.999 × 1 = 15.999 g/mol
Look up another formula
Compounds with the formula C21H20N4O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 123 compounds
![3-(2-Phenylethynyl)-2-(2-pyrrolidin-1-ylethoxy)pyrido[2,3-b]pyrazine chemical structure, C21H20N4O, CAS 1025015-40-0](/s/MNYJJHBAEYKXEG-UHFFFAOYSA-N.svg)
3-(2-Phenylethynyl)-2-(2-pyrrolidin-1-ylethoxy)pyrido[2,3-b]pyrazine
CAS 1025015-40-0C21H20N4O
![1-[[4-(2-Pyridinyl)-1-piperazinyl]methyl]-2-benzo[cd]indolone chemical structure, C21H20N4O, CAS 380458-28-6](/s/HTRVJZNOJDISMZ-UHFFFAOYSA-N.svg)
1-[[4-(2-Pyridinyl)-1-piperazinyl]methyl]-2-benzo[cd]indolone
CAS 380458-28-6C21H20N4O
![2-(4-{[1,1'-Biphenyl]-4-carbonyl}piperazin-1-yl)pyrimidine chemical structure, C21H20N4O, CAS 547703-94-6](/s/QLQHUMIUXHOSBK-UHFFFAOYSA-N.svg)
2-(4-{[1,1'-Biphenyl]-4-carbonyl}piperazin-1-yl)pyrimidine
CAS 547703-94-6C21H20N4O
3-(3-Imidazol-1-ylpropyl)-2-(4-methylphenyl)quinazolin-4-one
CAS 342596-36-5C21H20N4O
![4-(4-Methylpiperazin-1-yl)-2-phenyl[1]benzofuro[3,2-d]pyrimidine chemical structure, C21H20N4O, CAS 330556-68-8](/s/CBUUEZPMVUFWCA-UHFFFAOYSA-N.svg)
4-(4-Methylpiperazin-1-yl)-2-phenyl[1]benzofuro[3,2-d]pyrimidine
CAS 330556-68-8C21H20N4O
![N-Benzyl-3-(2-methoxyphenyl)-5-methylpyrazolo[1,5-a]pyrimidin-7-amine chemical structure, C21H20N4O, CAS 902013-86-9](/s/OVDRNBAKSVSDHU-UHFFFAOYSA-N.svg)
N-Benzyl-3-(2-methoxyphenyl)-5-methylpyrazolo[1,5-a]pyrimidin-7-amine
CAS 902013-86-9C21H20N4O
3-(4-Methylphenyl)-N'-(2-ME-3-PH-2-propenylidene)-1H-pyrazole-5-carbohydrazide
CAS 307941-78-2C21H20N4O
![4-(3,4-Dihydro-1H-isoquinolin-2-yl)-8-ethoxy-5H-pyrimido[5,4-b]indole chemical structure, C21H20N4O, CAS 848764-06-7](/s/LVQANJPLDBHCHT-UHFFFAOYSA-N.svg)
4-(3,4-Dihydro-1H-isoquinolin-2-yl)-8-ethoxy-5H-pyrimido[5,4-b]indole
CAS 848764-06-7C21H20N4O
![4-(1H-Imidazol-5-yl)-N-[2-(2-methyl-1H-indol-3-yl)ethyl]benzamide chemical structure, C21H20N4O, CAS 2490544-50-6](/s/XMWMPTMQNJXLNV-UHFFFAOYSA-N.svg)
4-(1H-Imidazol-5-yl)-N-[2-(2-methyl-1H-indol-3-yl)ethyl]benzamide
CAS 2490544-50-6C21H20N4O
2-(2-Methylphenyl)-5-(4-phenylpiperazin-1-yl)-1,3-oxazole-4-carbonitrile
CAS 613650-88-7C21H20N4O
![Benzo[a]phenazine-11-carboxamide, N-[2-(dimethylamino)ethyl]- chemical structure, C21H20N4O, CAS 103943-20-0](/s/ARKCBNOVQCRMQS-UHFFFAOYSA-N.svg)
Benzo[a]phenazine-11-carboxamide, N-[2-(dimethylamino)ethyl]-
CAS 103943-20-0C21H20N4O
![4-[2-Amino-4-ethyl-5-(2-methylindazol-6-yl)-3-pyridyl]phenol chemical structure, C21H20N4O, CAS 2009273-68-9](/s/NDTDLTOCWHTJKO-UHFFFAOYSA-N.svg)
4-[2-Amino-4-ethyl-5-(2-methylindazol-6-yl)-3-pyridyl]phenol
CAS 2009273-68-9C21H20N4O
![2-(4-{[1,1'-Biphenyl]-2-carbonyl}piperazin-1-yl)pyrimidine chemical structure, C21H20N4O, CAS 849523-41-7](/s/USLCVOLEVWHDKH-UHFFFAOYSA-N.svg)
2-(4-{[1,1'-Biphenyl]-2-carbonyl}piperazin-1-yl)pyrimidine
CAS 849523-41-7C21H20N4O
2-Propanol, 1-(methyl(3-phenylpyridazino(4,3-c)isoquinolin-6-yl)amino)-
CAS 96825-84-2C21H20N4O
F-16618 free base
CAS 960490-97-5C21H20N4O
![4-[(E)-{(3Z)-3-[(4-Carbamimidoylphenyl)methylidene]-2-oxocyclopentylidene}methyl]benzene-1-carboximidamide chemical structure, C21H20N4O, CAS 258519-12-9](/s/MGAQOPOKKIOCCX-MJZABRMRSA-N.svg)
4-[(E)-{(3Z)-3-[(4-Carbamimidoylphenyl)methylidene]-2-oxocyclopentylidene}methyl]benzene-1-carboximidamide
CAS 258519-12-9C21H20N4O
![Benzamide, N-[1-(2-methylpropyl)-1H-imidazo[4,5-c]quinolin-4-yl]- chemical structure, C21H20N4O, CAS 144660-62-8](/s/TZTHLAVJQIFKRJ-UHFFFAOYSA-N.svg)
Benzamide, N-[1-(2-methylpropyl)-1H-imidazo[4,5-c]quinolin-4-yl]-
CAS 144660-62-8C21H20N4O
4-(3-Ethyl-phenyl)-1,2-dimethyl-5-quinoxalin-6-yl-1,2-dihydro-pyrazol-3-one
CAS 937279-08-8C21H20N4O
![6,6-Dimethyl-9-(naphthalen-2-yl)-5,6,7,9-tetrahydro[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one chemical structure, C21H20N4O, CAS 669754-80-7](/s/IEMLZEMCIBUZFC-UHFFFAOYSA-N.svg)
6,6-Dimethyl-9-(naphthalen-2-yl)-5,6,7,9-tetrahydro[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one
CAS 669754-80-7C21H20N4O
![(r)-6-(4-Methoxyphenyl)-N-(1-phenylethyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine chemical structure, C21H20N4O, CAS 203724-37-2](/s/DGXVGHDUNRFLDB-CQSZACIVSA-N.svg)
(r)-6-(4-Methoxyphenyl)-N-(1-phenylethyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine
CAS 203724-37-2C21H20N4O
![6,6-Dimethyl-9-(naphthalen-1-yl)-5,6,7,9-tetrahydro[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one chemical structure, C21H20N4O, CAS 724779-83-3](/s/DPYHNUHLPHBZMF-UHFFFAOYSA-N.svg)
6,6-Dimethyl-9-(naphthalen-1-yl)-5,6,7,9-tetrahydro[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one
CAS 724779-83-3C21H20N4O
2-(2-Amino-5-(1-isopropyl-1H-indol-5-yl)pyrimidin-4-yl)phenol
CAS 1289141-78-1C21H20N4O
![Phenol, 4-methyl-2-[2-[3-methyl-4-[2-(3-methylphenyl)diazenyl]phenyl]diazenyl]- chemical structure, C21H20N4O, CAS 2475-42-5](/s/ZWGIWBPSFVJJAG-UHFFFAOYSA-N.svg)
Phenol, 4-methyl-2-[2-[3-methyl-4-[2-(3-methylphenyl)diazenyl]phenyl]diazenyl]-
CAS 2475-42-5C21H20N4O
![6-Amino-3-tert-butyl-4-(1-naphthyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile chemical structure, C21H20N4O, CAS 300587-30-8](/s/JNNSRXJIAHBURY-UHFFFAOYSA-N.svg)
6-Amino-3-tert-butyl-4-(1-naphthyl)-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile
CAS 300587-30-8C21H20N4O
- (E)-N'-(1-([1,1'-Biphenyl]-4-yl)ethylidene)-1,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carbohydrazide518018-46-7C21H20N4O
- (E)-3-(4-(Diethylamino)phenyl)-2-(4-oxo-3,4-dihydroquinazolin-2-yl)acrylonitrile53211-50-0C21H20N4O
- N-(2-Methoxyethyl)-3,5-diphenylpyrazolo[1,5-a]pyrimidin-7-amine890614-22-9C21H20N4O
- 2-Methyl-1-(3-phenyl-5-(quinoxalin-6-yl)-4,5-dihydro-1H-pyrazol-1-yl)propan-1-one946201-79-2C21H20N4O
- 3-(2-Methoxyphenyl)-5-methyl-N-(3-methylphenyl)pyrazolo[1,5-a]pyrimidin-7-amine890621-57-5C21H20N4O
- 1-[3-(4-Methylphenyl)-5-(quinoxalin-6-yl)-4,5-dihydro-1H-pyrazol-1-yl]propan-1-one1010900-63-6C21H20N4O
- 1-[3-[6-(Pyridin-3-ylmethylamino)-1H-pyrrolo[2,3-b]pyridin-4-yl]phenyl]ethanol1360251-05-3C21H20N4O
- N-(4-Ethoxyphenyl)-5-methyl-3-phenylpyrazolo[1,5-a]pyrimidin-7-amine850901-67-6C21H20N4O
- 1,5-Dimethyl-4-{[(2-methyl-3H-indol-3-ylidene)methyl]amino}-2-phenyl-1,2-dihydro-3H-pyrazol-3-one385800-00-0C21H20N4O
- 3-(2-Methoxyphenyl)-5-methyl-N-(4-methylphenyl)pyrazolo[1,5-a]pyrimidin-7-amine890621-43-9C21H20N4O
- 2-(4,6-Dimethylpyrimidin-2-yl)-5-methyl-4-(naphthalen-1-ylmethyl)-2,4-dihydro-3H-pyrazol-3-one882397-35-5C21H20N4O
- N-(4-Methoxyphenyl)-5-methyl-3-(4-methylphenyl)pyrazolo[1,5-a]pyrimidin-7-amine890611-53-7C21H20N4O
- N-(3-Methoxyphenyl)-5-methyl-3-(4-methylphenyl)pyrazolo[1,5-a]pyrimidin-7-amine890612-73-4C21H20N4O
- 4-[6-(4-Methoxyphenyl)pyrazolo[1,5-a]pyrimidin-2-yl]-N,N-dimethylaniline893613-37-1C21H20N4O
- 2-(2-Methoxyphenyl)-5-methyl-N-(3-methylphenyl)pyrazolo[1,5-a]pyrimidin-7-amine950345-88-7C21H20N4O
- N-Benzhydryl-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxamide1797322-15-6C21H20N4O
- N-{[1,1'-Biphenyl]-2-yl}-6-(pyrrolidin-1-yl)pyrimidine-4-carboxamide2034283-50-4C21H20N4O
- c-ABL-IN-22574593-54-5C21H20N4O
- 2-(3-Methylphenyl)-5-(4-phenylpiperazin-1-yl)-1,3-oxazole-4-carbonitrile613651-22-2C21H20N4O
- N-(3-Methoxyphenyl)-2,5-dimethyl-3-phenylpyrazolo[1,5-a]pyrimidin-7-amine896065-40-0C21H20N4O
- N-(4-Methoxyphenyl)-2,5-dimethyl-3-phenylpyrazolo[1,5-a]pyrimidin-7-amine877788-04-0C21H20N4O
- 1-[2-(1H-Benzimidazol-2-yl)pyrrolidin-1-yl]-2-(1H-indol-3-yl)ethanone929858-75-3C21H20N4O
- 1-(4,6-Dimethylpyrimidin-2-yl)-6-[(E)-2-phenylethenyl]-1,5,6,7-tetrahydro-4H-indazol-4-one896668-66-9C21H20N4O
- 1-(3-(4-Ethylphenyl)-5-(quinoxalin-6-yl)-4,5-dihydro-1H-pyrazol-1-yl)ethanone946258-58-8C21H20N4O
- N-[2-(1H-Indol-3-yl)ethyl]-2,3-dimethyl-6-quinoxalinecarboxamide1211082-56-2C21H20N4O
- 1-[4-(3,4-Dihydro-2,7-naphthyridin-2(1H)-yl)phenyl]-3-phenylurea1454657-19-2C21H20N4O
- N'-(Diphenylmethylidene)-5H,6H,7H,8H-imidazo[1,5-a]pyridine-7-carbohydrazide1790156-24-9C21H20N4O
- (4-Amino-7-benzyl-2-methyl-5,7-dihydro-6H-pyrrolo[3,4-d]pyrimidin-6-yl)(phenyl)methanone1854-38-2C21H20N4O
- 3-(3,5-Dimethyl-1H-pyrazol-1-yl)-N'-(9H-fluoren-9-ylidene)propanehydrazide313272-59-2C21H20N4O
- 4-[4-(3-Imidazol-1-yl-1-phenoxy-propyl)-phenyl]-1H-pyrazole857531-73-8C21H20N4O
- N-Benzyl-2-(2-methoxyphenyl)-5-methylpyrazolo[1,5-a]pyrimidin-7-amine950391-83-0C21H20N4O
- N-(4-Methoxyphenyl)-3,5-dimethyl-2-phenylpyrazolo[1,5-a]pyrimidin-7-amine1203002-92-9C21H20N4O
- N-[(2-Methoxyphenyl)methyl]-5-(1H-pyrrolo[2,3-b]pyridin-3-ylmethyl)-2-pyridinamine1029044-96-9C21H20N4O
- N-[4-[[3-(1-Cyclohexen-1-yl)-2-pyrazinyl]oxy]phenyl]-2-pyridinamine1231923-27-5C21H20N4O
- 2-([1,1'-Biphenyl]-4-yl)-1-(3-(pyrimidin-2-ylamino)azetidin-1-yl)ethanone2177449-86-2C21H20N4O
- (1H-Indol-3-yl)(3-(2-methyl-1H-benzo[d]imidazol-1-yl)pyrrolidin-1-yl)methanone2034384-93-3C21H20N4O
- 2-(4-Methylphenyl)-3-(oxolan-2-ylmethyl)imidazo[4,5-b]quinoxaline846581-52-0C21H20N4O
- 4-[4-(3-Methylphenyl)piperazin-1-yl]-[1]benzofuro[3,2-d]pyrimidine845806-03-3C21H20N4O
- 4-(3-Aminopropyl)-5-(2-phenylquinolin-4-yl)-1H-pyrazol-3(2H)-one881040-84-2C21H20N4O
- 7-(4-Ethoxyphenyl)-N-methyl-5-phenyl-7H-pyrrolo[2,3-d]pyrimidin-4-amine883267-71-8C21H20N4O
- 2-Methyl-4-(4-phenylpiperazin-1-yl)-[1]benzofuro[3,2-d]pyrimidine848739-78-6C21H20N4O
- 5-[(2,5-Dimethylphenyl)methyl]-1-(2-methylphenyl)pyrazolo[3,4-d]pyrimidin-4-one895012-33-6C21H20N4O
- 1-(2,3-Dimethylphenyl)-5-[(2-methylphenyl)methyl]pyrazolo[3,4-d]pyrimidin-4-one894994-18-4C21H20N4O
- 1-(2,3-Dimethylphenyl)-5-[(3-methylphenyl)methyl]pyrazolo[3,4-d]pyrimidin-4-one894994-34-4C21H20N4O
- 1-(2,3-Dimethylphenyl)-5-[(4-methylphenyl)methyl]pyrazolo[3,4-d]pyrimidin-4-one894994-50-4C21H20N4O
- 1-(2,4-Dimethylphenyl)-5-[(2-methylphenyl)methyl]pyrazolo[3,4-d]pyrimidin-4-one895002-51-4C21H20N4O
- 1-(2,4-Dimethylphenyl)-5-[(3-methylphenyl)methyl]pyrazolo[3,4-d]pyrimidin-4-one895002-67-2C21H20N4O
- 1-(2,4-Dimethylphenyl)-5-[(4-methylphenyl)methyl]pyrazolo[3,4-d]pyrimidin-4-one895002-83-2C21H20N4O
- 1-Pentanone, 1-[2-[2-(1H-imidazol-2-yl)phenyl]-1H-benzimidazol-5-yl]-824395-30-4C21H20N4O
- 4-Methyl-6-phenethyl-1-(o-tolyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one942009-27-0C21H20N4O
- 6-Benzyl-4-isopropyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one946204-09-7C21H20N4O
- 2-{4-[2-Ethyl-5-(5-pyrimidinyl)-1H-benzimidazol-1-yl]phenyl}ethanol415914-47-5C21H20N4O
- 5-Isopropyl-2-(3-methoxy-6-pyridin-4-yl-pyridazin-4-yl)-1H-indole870098-06-9C21H20N4O
- 3-Isopropyl-1-(4-phenoxyphenyl)imidazo[1,5-a]pyrazin-8-amine1196387-04-8C21H20N4O
- N-(1H-Indol-5-yl)-1-phenyl-3-(propan-2-yl)-1H-pyrazole-5-carboxamide1324074-89-6C21H20N4O
- N-(1H-Indol-6-yl)-1-phenyl-3-(propan-2-yl)-1H-pyrazole-5-carboxamide1324095-93-3C21H20N4O
- N-[2-(1H-Indol-3-yl)ethyl]-1-methyl-3-phenyl-1H-pyrazole-5-carboxamide1374520-15-6C21H20N4O
- N-([1,1'-Biphenyl]-2-yl)-6-(pyrrolidin-1-yl)pyridazine-3-carboxamide1396791-01-7C21H20N4O
- N-(3-(1H-Pyrrolo[2,3-b]pyridin-1-yl)propyl)-4-(1H-pyrrol-1-yl)benzamide1788770-23-9C21H20N4O
- N-(2-(1H-Imidazo[1,2-b]pyrazol-1-yl)ethyl)-2,2-diphenylacetamide1795416-20-4C21H20N4O
- (R)-2-((5-(3-Methyl-1H-indazol-5-yl)pyridin-3-yl)amino)-2-phenylethanol1613638-88-2C21H20N4O
- (E)-3-Phenyl-1-(3-(4-phenyl-1H-1,2,3-triazol-1-yl)pyrrolidin-1-yl)prop-2-en-1-one2034997-38-9C21H20N4O
- (1H-Indol-2-yl)(3-(2-methyl-1H-benzo[d]imidazol-1-yl)pyrrolidin-1-yl)methanone2034559-87-8C21H20N4O
- 4-(8-((4-Isopropylphenyl)amino)imidazo[1,2-a]pyrazin-3-yl)phenol1124320-24-6C21H20N4O
- N-(2-((3-Cyano-6-methylquinolin-2-yl)amino)ethyl)-2-methylbenzamide606105-44-6C21H20N4O
- N-(2-((3-Cyano-8-methylquinolin-2-yl)amino)ethyl)-2-methylbenzamide606105-10-6C21H20N4O
- 9-Methyl-7-phenyl-4-(1-piperidinyl)pyrido[3',2':4,5]furo[3,2-d]pyrimidine496970-53-7C21H20N4O
- Benzonitrile, 4-[[[2-methyl-4-(1-pyrrolidinyl)-7-quinazolinyl]oxy]methyl]-646450-56-8C21H20N4O
- 2-(1H-Indol-3-yl)-N-[3-(pyrimidin-2-yloxy)benzyl]ethanamine932246-27-0C21H20N4O
- 1-(3,4-Dimethylphenyl)-5-(3-methylbenzyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one852451-74-2C21H20N4O
- N-[2-(1H-Imidazol-4-yl)ethyl]-2-(2-phenyl-1H-indol-1-yl)acetamide1081131-83-0C21H20N4O
- (E)-2-Cyano-3-(5-cyano-1,2-dimethylpyrrol-3-yl)-N-[(1-phenylcyclopropyl)methyl]prop-2-enamide1445764-20-4C21H20N4O
- 5-(2,6-Dimethylpyridin-4-yl)-5-(3-methoxyphenyl)-5H-pyrrolo[3,4-b]pyridin-7-amine1226799-70-7C21H20N4O
- 2-(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl)-N-(1H-indol-4-yl)acetamide1374546-81-2C21H20N4O
- N-(2-Methylphenyl)-1-(6-phenylpyrimidin-4-yl)azetidine-3-carboxamide2034285-35-1C21H20N4O
- 2-Propenenitrile, 3-amino-2-((1,3-dihydro-3-oxo-2H-indol-2-ylidene)methyl)-3-((1-methyl-2-phenylethyl)amino)-171853-15-9C21H20N4O
Frequently asked questions
What is the molar mass of C21H20N4O?
The molar mass of C21H20N4O is 344.42 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms, 4 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 344.1637 Da.
How many compounds have the formula C21H20N4O?
CompoundList lists 123 compounds with the molecular formula C21H20N4O, including 3-(2-Phenylethynyl)-2-(2-pyrrolidin-1-ylethoxy)pyrido[2,3-b]pyrazine, 1-[[4-(2-Pyridinyl)-1-piperazinyl]methyl]-2-benzo[cd]indolone, 2-(4-{[1,1'-Biphenyl]-4-carbonyl}piperazin-1-yl)pyrimidine. 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 C21H20N4O?
C21H20N4O 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.