Molecular formula
C21H18N2O3
221 compounds have this formula on CompoundList.
- Molar mass
- 346.39g/mol
- Monoisotopic mass
- 346.1317Da
- Atoms
- 44
- Elements
- 4
- Rings plus double bonds
- 14
The formula C21H18N2O3 describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms and 3 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 × 2172.82%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 185.24%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 28.09%14.007 × 2 = 28.014 g/mol
- O Oxygen × 313.86%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C21H18N2O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 221 compounds
![1'-(1H-Indole-5-carbonyl)-3H-spiro[isobenzofuran-1,4'-piperidin]-3-one chemical structure, C21H18N2O3, CAS 1797890-35-7](/s/CIQZUCPTPCWBKW-UHFFFAOYSA-N.svg)
1'-(1H-Indole-5-carbonyl)-3H-spiro[isobenzofuran-1,4'-piperidin]-3-one
CAS 1797890-35-7C21H18N2O3
n,n'-(4-Methoxybenzene-1,2-diyl)dibenzamide
CAS 4280-43-7C21H18N2O3
![N-{(e)-[4-(Benzyloxy)phenyl]methylene}-2-methyl-5-nitroaniline chemical structure, C21H18N2O3, CAS 70627-43-9](/s/TVZDRVMEWVLSBO-UHFFFAOYSA-N.svg)
N-{(e)-[4-(Benzyloxy)phenyl]methylene}-2-methyl-5-nitroaniline
CAS 70627-43-9C21H18N2O3
![2-[4-[(4-Phenoxyphenyl)iminomethyl]phenoxy]acetamide chemical structure, C21H18N2O3, CAS 365435-58-1](/s/XLLYLAODBHXNBE-UHFFFAOYSA-N.svg)
2-[4-[(4-Phenoxyphenyl)iminomethyl]phenoxy]acetamide
CAS 365435-58-1C21H18N2O3
N-(4-Methoxybenzyl)-3-(1H-pyrrol-1-yl)-1-benzofuran-2-carboxamide
CAS 865658-56-6C21H18N2O3
![N'-(4-Methylbenzoyl)-1,2-dihydronaphtho[2,1-b]furan-2-carbohydrazide chemical structure, C21H18N2O3, CAS 478064-23-2](/s/YPUXAJCUYCVLAJ-UHFFFAOYSA-N.svg)
N'-(4-Methylbenzoyl)-1,2-dihydronaphtho[2,1-b]furan-2-carbohydrazide
CAS 478064-23-2C21H18N2O3
![N-[1-(Furan-2-carbonyl)-1,2,3,4-tetrahydroquinolin-7-yl]benzamide chemical structure, C21H18N2O3, CAS 946244-04-8](/s/CIKLRZLWXMIRPE-UHFFFAOYSA-N.svg)
N-[1-(Furan-2-carbonyl)-1,2,3,4-tetrahydroquinolin-7-yl]benzamide
CAS 946244-04-8C21H18N2O3
6-(6,7-Dimethoxyquinolin-4-yloxy)naphthalen-1-amine
CAS 861881-29-0C21H18N2O3
4-(Benzyloxy)-N-(furan-2-ylmethyl)-1H-indole-2-carboxamide
CAS 1448038-05-8C21H18N2O3
Furan-2-yl(3-(2-hydroxyphenyl)-5-(p-tolyl)-4,5-dihydro-1H-pyrazol-1-yl)methanone
CAS 876942-73-3C21H18N2O3
![2-Hydroxybenzoic acid 2-[[2-(phenylmethoxy)phenyl]methylene]hydrazide chemical structure, C21H18N2O3, CAS 306325-09-7](/s/XGXPZKWDUFSYRV-UHFFFAOYSA-N.svg)
2-Hydroxybenzoic acid 2-[[2-(phenylmethoxy)phenyl]methylene]hydrazide
CAS 306325-09-7C21H18N2O3
5-(1,3-Benzoxazol-2-yl)-2-cyclohexylisoindole-1,3-dione
CAS 384367-78-6C21H18N2O3
N-Benzyl-N-(4-methylphenyl)-4-nitrobenzamide
CAS 66565-56-8C21H18N2O3
![N-[3-[[(E)-3-(Furan-2-yl)prop-2-enoyl]amino]phenyl]-4-methylbenzamide chemical structure, C21H18N2O3, CAS 667446-61-9](/s/JGTJAZUROGOTSZ-VAWYXSNFSA-N.svg)
N-[3-[[(E)-3-(Furan-2-yl)prop-2-enoyl]amino]phenyl]-4-methylbenzamide
CAS 667446-61-9C21H18N2O3
1-(1,3-Benzodioxol-5-yl)-3-(2-benzylphenyl)urea
CAS 701927-85-7C21H18N2O3
![3-Benzyl-2-propyl-3H-chromeno[2,3-d]pyrimidine-4,5-dione chemical structure, C21H18N2O3, CAS 899389-36-7](/s/MMFUEOQCNDBYDD-UHFFFAOYSA-N.svg)
3-Benzyl-2-propyl-3H-chromeno[2,3-d]pyrimidine-4,5-dione
CAS 899389-36-7C21H18N2O3
3-Benzamido-N-(3-methoxyphenyl)benzamide
CAS 600125-49-3C21H18N2O3
1-(3-Methoxybenzyl)-6-(4-methoxyphenyl)-2-oxo-1,2-dihydro-3-pyridinecarbonitrile
CAS 337919-91-2C21H18N2O3
4-(4-Methoxyphenyl)-5-oxo-2-(1H-pyrrol-1-yl)-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile
CAS 339100-59-3C21H18N2O3
![N-[1-(Furan-2-carbonyl)-3,4-dihydro-2H-quinolin-6-yl]benzamide chemical structure, C21H18N2O3, CAS 942005-70-1](/s/YWKIVGSXJZVDEA-UHFFFAOYSA-N.svg)
N-[1-(Furan-2-carbonyl)-3,4-dihydro-2H-quinolin-6-yl]benzamide
CAS 942005-70-1C21H18N2O3
Acetamide, 2-(4-((hydroxyimino)phenylmethyl)phenoxy)-N-phenyl-
CAS 51828-67-2C21H18N2O3
1-Propanone, 3-(4-nitrophenyl)-1-phenyl-3-(phenylamino)-
CAS 113451-12-0C21H18N2O3
2-Methyl-4-(2-oxoindoline-3-yl)-5-phenyl-1H-pyrrole-3-carboxylic acid methyl ester
CAS 851085-17-1C21H18N2O3
![2-Methoxy-4-[3-(2-methoxy-phenyl)-1H-pyrrolo[2,3-b]pyridin-5-yl]phenol chemical structure, C21H18N2O3, CAS 875638-65-6](/s/IEMWKMDRKRSULH-UHFFFAOYSA-N.svg)
2-Methoxy-4-[3-(2-methoxy-phenyl)-1H-pyrrolo[2,3-b]pyridin-5-yl]phenol
CAS 875638-65-6C21H18N2O3
- 1-(2-(Naphthalen-2-yloxy)acetyl)indoline-2-carboxamide1097624-71-9C21H18N2O3
- N-(4-Methyl-5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)-2-naphthamide922128-02-7C21H18N2O3
- N-(1-Benzoyl-1,2,3,4-tetrahydroquinolin-6-yl)furan-2-carboxamide946368-01-0C21H18N2O3
- 2-(5-(Benzofuran-2-yl)isoxazol-3-yl)-N-phenethylacetamide1105218-69-6C21H18N2O3
- 2-Ethoxy-N-(2-oxoindolin-5-yl)-1-naphthamide921774-55-2C21H18N2O3
- N-(3-Benzamido-4-methoxyphenyl)benzamide13431-11-3C21H18N2O3
- 2-Cyano-3-(4-hydroxy-3-methoxyphenyl)-N-(naphthalen-1-yl)propanamide1260911-18-9C21H18N2O3
- 4-(4-Isopropyl-phenyl)-6-prop-2-ynyloxy-quinazoline-2-carboxylic acid927201-99-8C21H18N2O3
- 1'-(1H-Indole-3-carbonyl)-3H-spiro[2-benzofuran-1,4'-piperidine]-3-one1705969-42-1C21H18N2O3
- N-[(4-Methoxyphenyl)-phenylmethyl]-N-nitrosobenzamide51271-73-9C21H18N2O3
- 2-(2-(6,7-Dimethyl-2-oxo-1,2-dihydroquinolin-3-yl)ethyl)isoindoline-1,3-dione702665-71-2C21H18N2O3
- N-(4-Acetylphenyl)-1-benzyl-6-oxo-1,6-dihydropyridine-3-carboxamide1004256-21-6C21H18N2O3
- 3-[2-(5-Methyl-3-phenyl-1,2-oxazol-4-yl)-1H-indol-3-yl]propanoic acid88933-56-6C21H18N2O3
- Ethyl 2-(2-((1H-indol-3-yl)methyl)-1H-indol-3-yl)-2-oxoacetate229020-85-3C21H18N2O3
- 4-(1H-Indol-3-yl)-N-(2-oxo-2H-chromen-6-yl)butanamide919736-74-6C21H18N2O3
- N-(2-(Furan-2-carbonyl)-1,2,3,4-tetrahydroisoquinolin-7-yl)benzamide955687-36-2C21H18N2O3
- N-(4-Methyl-5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)-1-naphthamide921995-75-7C21H18N2O3
- 3-[4-(2-Methyl-quinolin-4-ylmethoxy)-phenyl]-4,5-dihydro-isoxazole-5-carbaldehyde694450-38-9C21H18N2O3
- 6,7-Dimethoxy-4-(7-methyl-quinolin-6-yloxy)-quinoline666732-12-3C21H18N2O3
- 6,7-Dimethoxy-4-(7-methyl-isoquinolin-6-yloxy)-quinoline666732-20-3C21H18N2O3
- 6,7-Dimethoxy-4-(2-methyl-quinolin-3-yloxy)-quinoline666731-92-6C21H18N2O3
- 6,7-Dimethoxy-4-(2-methyl-quinolin-4-yloxy)-quinoline666732-35-0C21H18N2O3
- 1-Benzofuran-2-yl(8-methoxy-1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indol-2-yl)methanone1010909-55-3C21H18N2O3
- 1-(4-Methoxyphenyl)-3-phenoxy-4-(pyridin-3-yl)azetidin-2-one1210446-67-5C21H18N2O3
- N-(5-Formyl-2-methylphenyl)-4-(pyridin-2-ylmethoxy)benzamide1131604-86-8C21H18N2O3
- N-[2-(Benzyloxy)-5-(pyridine-2-carbonyl)phenyl]acetamide58283-19-5C21H18N2O3
- Methyl 4-(2-(phenylamino)phenylcarbamoyl)benzoate1024010-77-2C21H18N2O3
- 3-(3-(Cyclopropanecarboxamido)isoquinolin-7-yl)-4-methylbenzoic acid1382848-07-8C21H18N2O3
- Ethyl 3-(4-(benzyloxy)phenyl)-4-cyano-1H-pyrrole-2-carboxylate851199-54-7C21H18N2O3
- 3-(Anthracen-9-yl)-5-tert-butyl-4-nitro-1,2-oxazole922139-06-8C21H18N2O3
- 1'-(1H-Indole-2-carbonyl)-3H-spiro[2-benzofuran-1,4'-piperidine]-3-one1706073-50-8C21H18N2O3
- 1'-(1H-Indole-2-carbonyl)-3H-spiro[2-benzofuran-1,3'-piperidine]-3-one1704532-75-1C21H18N2O3
- 1'-(1H-Indole-3-carbonyl)-3H-spiro[2-benzofuran-1,3'-piperidine]-3-one1705860-43-0C21H18N2O3
- 3-({[2,2'-Bifuran]-5-yl}methyl)-1-[(naphthalen-1-yl)methyl]urea2034253-12-6C21H18N2O3
- N-{4-Methoxy-3-[(quinolin-2-yl)methoxy]phenyl}but-2-ynamide2094548-39-5C21H18N2O3
- 3-({[2,3'-Bifuran]-5-yl}methyl)-1-[(naphthalen-1-yl)methyl]urea2034251-35-7C21H18N2O3
- 2-(5-(Furan-2-yl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazin-2-yl)-4-methylphenol899728-93-9C21H18N2O3
- 4-(4-Methoxyphenyl)-2,3-diphenyl-1,2,4-oxadiazolidin-5-one62803-76-3C21H18N2O3
- 1H-Pyrrolo[2,3-b]pyridin-2(3H)-one, 3,3-di(4-methoxyphenyl)-959219-82-0C21H18N2O3
- 4-[[(E)-3-(Furan-2-yl)prop-2-enoyl]amino]-N-(2-methylphenyl)benzamide667446-56-2C21H18N2O3
- (5E)-1-(3,4-Dimethylphenyl)-5-[(E)-3-phenylprop-2-enylidene]-1,3-diazinane-2,4,6-trione347388-53-8C21H18N2O3
- (4Z)-4-[(3-Methoxy-4-prop-2-ynoxyphenyl)methylidene]-5-methyl-2-phenylpyrazol-3-one345986-57-4C21H18N2O3
- N-(4-Acetylphenyl)-1-benzyl-2-oxo-1,2-dihydropyridine-3-carboxamide946353-25-9C21H18N2O3
- N-(1-Benzyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)furan-2-carboxamide941953-54-4C21H18N2O3
- N-(2-Methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-6-yl)-2-(naphthalen-1-yl)acetamide924153-64-0C21H18N2O3
- 7-Methyl-2-[4-(prop-2-EN-1-yloxy)phenyl]-3H,4H,5H-chromeno[2,3-D]pyrimidin-4-one902857-26-5C21H18N2O3
- 9-(Morpholinomethyl)-12H-chromeno[2,3-b]quinolin-12-one1007809-27-9C21H18N2O3
- 3-{[(Biphenyl-4-yloxy)acetyl]amino}benzamide1003416-56-5C21H18N2O3
- N-(1-Benzoyl-1,2,3,4-tetrahydroquinolin-7-yl)furan-2-carboxamide946266-62-2C21H18N2O3
- 2-(Naphthalen-2-yloxy)-N-(2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)acetamide922054-46-4C21H18N2O3
- (2E)-3-(1,3-Benzodioxol-5-yl)-1-(1,3,4,5-tetrahydro-2H-pyrido[4,3-b]indol-2-yl)prop-2-en-1-one1021042-60-3C21H18N2O3
- 2-(5-(Benzofuran-2-yl)isoxazol-3-yl)-N-(1-phenylethyl)acetamide1105243-81-9C21H18N2O3
- Benzyl 2-(3,4-diaminobenzoyl)benzoate870604-83-4C21H18N2O3
- 3-Hydroxy-N-{3-[(2-methylprop-2-enoyl)amino]phenyl}naphthalene-2-carboxamide17361-63-6C21H18N2O3
- N-(9H-Fluoren-2-yl)-4-methoxy-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxamide2034277-21-7C21H18N2O3
- 2-(5-(5-Methylfuran-2-yl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazin-2-yl)phenol899728-85-9C21H18N2O3
- Benzamide, 4-methoxy-N-[2-(2-pyridinylacetyl)phenyl]-87165-92-2C21H18N2O3
- (2-Methyl-4-((2-nitrophenyl)amino)phenyl)(o-tolyl)methanone321378-36-3C21H18N2O3
- 1-(2-{[6-(Naphthalen-1-yl)pyridin-3-yl]oxy}ethyl)pyrrolidine-2,5-dione918146-88-0C21H18N2O3
- 1-(2-{[6-(Naphthalen-2-yl)pyridin-3-yl]oxy}ethyl)pyrrolidine-2,5-dione918146-86-8C21H18N2O3
- {4-[Benzyl(methyl)amino]-3-nitrophenyl}(phenyl)methanone56106-93-5C21H18N2O3
- {4-[Ethyl(phenyl)amino]-3-nitrophenyl}(phenyl)methanone56106-92-4C21H18N2O3
- Methyl 5-methoxy-1-(quinolin-2-ylmethyl)-1H-indole-7-carboxylate1196049-51-0C21H18N2O3
- Ethyl 1-((2-phenyloxazol-4-yl)methyl)-1H-indole-2-carboxylate1196050-94-8C21H18N2O3
- 3-(3-(6-Phenylpicolinamido)phenyl)propanoic acid863704-82-9C21H18N2O3
- 2-Methoxy-4-[3-(4-methoxyphenyl)-1H-pyrrolo[2,3-b]pyridin-5-yl]phenol875638-66-7C21H18N2O3
- 2-[[(2S)-2-Amino-3-pyren-1-ylpropanoyl]amino]acetic acid918957-81-0C21H18N2O3
- 6-[(4-Hydroxyanilino)methylidene]-2-{(E)-[(4-hydroxyphenyl)imino]methyl}-4-methylcyclohexa-2,4-dien-1-one820212-74-6C21H18N2O3
- 4-[(Acridin-9-yl)amino]-2,6-dimethoxyphenol139501-99-8C21H18N2O3
- N-(4-Methoxyphenyl)-N-methyl-2-nitro-9H-fluoren-9-amine62799-35-3C21H18N2O3
- 4-Benzoyl-6-[2-(4-ethylphenyl)hydrazinylidene]-3-hydroxycyclohexa-2,4-dien-1-one65412-21-7C21H18N2O3
- 2,5-Dianilino-3-propanoylcyclohexa-2,5-diene-1,4-dione62370-25-6C21H18N2O3
- 6-(Benzyloxy)-7-(3,5-dimethylisoxazol-4-yl)quinolin-4(1H)-one2525175-16-8C21H18N2O3
- (9H-Fluoren-9-yl)methyl N-[(5-hydroxypyridin-3-yl)methyl]carbamate2764002-44-8C21H18N2O3
- (9H-Fluoren-9-yl)methyl N-(2-hydroxy-5-methylpyridin-4-yl)carbamate2764001-42-3C21H18N2O3
- (9H-Fluoren-9-yl)methyl N-[(5-hydroxypyridin-2-yl)methyl]carbamate2763955-39-9C21H18N2O3
Frequently asked questions
What is the molar mass of C21H18N2O3?
The molar mass of C21H18N2O3 is 346.39 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 346.1317 Da.
How many compounds have the formula C21H18N2O3?
CompoundList lists 221 compounds with the molecular formula C21H18N2O3, including 1'-(1H-Indole-5-carbonyl)-3H-spiro[isobenzofuran-1,4'-piperidin]-3-one, n,n'-(4-Methoxybenzene-1,2-diyl)dibenzamide, N-{(e)-[4-(Benzyloxy)phenyl]methylene}-2-methyl-5-nitroaniline. 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 C21H18N2O3?
C21H18N2O3 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.