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 1 to 100 of 221 compounds
Dihydrorhodamine 123
CAS 109244-58-8C21H18N2O3
N'-(4-(Benzyloxy)benzylidene)-4-hydroxybenzohydrazide
CAS 302910-63-0C21H18N2O3
![4-[[2-(4-Phenylphenoxy)acetyl]amino]benzamide chemical structure, C21H18N2O3, CAS 302550-89-6](/s/AWHZOHCWDCVMNE-UHFFFAOYSA-N.svg)
4-[[2-(4-Phenylphenoxy)acetyl]amino]benzamide
CAS 302550-89-6C21H18N2O3
![1-Hydroxy-N-[2-(5-hydroxy-1H-indol-3-yl)ethyl]naphthalene-2-carboxamide chemical structure, C21H18N2O3, CAS 1255516-86-9](/s/KHJNISGKGIHTMY-UHFFFAOYSA-N.svg)
1-Hydroxy-N-[2-(5-hydroxy-1H-indol-3-yl)ethyl]naphthalene-2-carboxamide
CAS 1255516-86-9C21H18N2O3
Benzilic acid N-(2-hydroxybenzylidene)hydrazide
CAS 78486-37-0C21H18N2O3
RefChem:919545
CAS 249762-74-1C21H18N2O3
![Ethyl 2-methyl-5-oxo-4-(pyridin-3-yl)-4,5-dihydro-1H-indeno[1,2-b]pyridine-3-carboxylate chemical structure, C21H18N2O3, CAS 445221-52-3](/s/WJPKBMAABYJLFS-UHFFFAOYSA-N.svg)
Ethyl 2-methyl-5-oxo-4-(pyridin-3-yl)-4,5-dihydro-1H-indeno[1,2-b]pyridine-3-carboxylate
CAS 445221-52-3C21H18N2O3
2-Benzamido-N-(4-methoxyphenyl)benzamide
CAS 73343-44-9C21H18N2O3
2-(2-Hydroxyphenyl)-3-(4-methoxyphenyl)-2,3-dihydroquinazolin-4(1H)-one
CAS 312626-87-2C21H18N2O3
![3-[1-(Furan-2-yl)-2-nitroethyl]-2-(4-methylphenyl)-1H-indole chemical structure, C21H18N2O3, CAS 308294-78-2](/s/PFYOYTNZIIHWRS-UHFFFAOYSA-N.svg)
3-[1-(Furan-2-yl)-2-nitroethyl]-2-(4-methylphenyl)-1H-indole
CAS 308294-78-2C21H18N2O3
(E)-3-(3-(2,6-Dimethyl-4-oxo-5-phenylpyrimidin-1(4H)-yl)phenyl)acrylic acid
CAS 375361-11-8C21H18N2O3
![2-Cyclohexyl-1,2-dihydro-naphtho[2,3-g]indazole-3,6,11-trione chemical structure, C21H18N2O3, CAS 5474-78-2](/s/PGBGUZRKFRBNBT-UHFFFAOYSA-N.svg)
2-Cyclohexyl-1,2-dihydro-naphtho[2,3-g]indazole-3,6,11-trione
CAS 5474-78-2C21H18N2O3
4-(7-Diethylaminocoumarin-3-yl)benzoyl cyanide
CAS 203256-20-6C21H18N2O3
![3-Hydroxy-1-methyl-3-{2-oxo-2-[3-(1H-pyrrol-1-yl)phenyl]ethyl}-1,3-dihydro-2H-indol-2-one chemical structure, C21H18N2O3, CAS 688031-12-1](/s/MFHVDJWVQFUXAH-UHFFFAOYSA-N.svg)
3-Hydroxy-1-methyl-3-{2-oxo-2-[3-(1H-pyrrol-1-yl)phenyl]ethyl}-1,3-dihydro-2H-indol-2-one
CAS 688031-12-1C21H18N2O3
![N-[(E)-3-(4-Methylanilino)-3-oxo-1-phenylprop-1-en-2-yl]furan-2-carboxamide chemical structure, C21H18N2O3, CAS 69763-55-9](/s/SLTRYIRRJJVHIJ-NBVRZTHBSA-N.svg)
N-[(E)-3-(4-Methylanilino)-3-oxo-1-phenylprop-1-en-2-yl]furan-2-carboxamide
CAS 69763-55-9C21H18N2O3
![Ethyl 3-amino-1-(pyridin-3-yl)-1H-benzo[f]chromene-2-carboxylate chemical structure, C21H18N2O3, CAS 330957-90-9](/s/UXKOKFCWXKARIP-UHFFFAOYSA-N.svg)
Ethyl 3-amino-1-(pyridin-3-yl)-1H-benzo[f]chromene-2-carboxylate
CAS 330957-90-9C21H18N2O3
![[2-(Cyclopropylamino)-2-oxoethyl] 2-phenylquinoline-4-carboxylate chemical structure, C21H18N2O3, CAS 438591-85-6](/s/PMUIYXWLOLPVQM-UHFFFAOYSA-N.svg)
[2-(Cyclopropylamino)-2-oxoethyl] 2-phenylquinoline-4-carboxylate
CAS 438591-85-6C21H18N2O3
Methyl 4-(diphenylcarbamoylamino)benzoate
CAS 501105-07-3C21H18N2O3
![N-[4-(2-Amino-2-oxoethoxy)phenyl]-2-phenylbenzamide chemical structure, C21H18N2O3, CAS 694444-73-0](/s/CCXOIYVFOISBOR-UHFFFAOYSA-N.svg)
N-[4-(2-Amino-2-oxoethoxy)phenyl]-2-phenylbenzamide
CAS 694444-73-0C21H18N2O3
![3-(4-Methylphenyl)-2-propylchromeno[2,3-d]pyrimidine-4,5-dione chemical structure, C21H18N2O3, CAS 883955-85-9](/s/AEQRYVPXPZWLDR-UHFFFAOYSA-N.svg)
3-(4-Methylphenyl)-2-propylchromeno[2,3-d]pyrimidine-4,5-dione
CAS 883955-85-9C21H18N2O3
1-(2-Methoxydibenzofuran-3-yl)-3-(4-methylphenyl)urea
CAS 291277-37-7C21H18N2O3
3-Benzamido-N-(4-methoxyphenyl)benzamide
CAS 600124-72-9C21H18N2O3
![3-Methyl-6-morpholin-4-yl-3H-naphtho[1,2,3-de]quinoline-2,7-dione chemical structure, C21H18N2O3, CAS 309277-07-4](/s/REMKVOWNYFATFL-UHFFFAOYSA-N.svg)
3-Methyl-6-morpholin-4-yl-3H-naphtho[1,2,3-de]quinoline-2,7-dione
CAS 309277-07-4C21H18N2O3
n,n-Dibenzyl-4-nitrobenzamide
CAS 2585-27-5C21H18N2O3
- N-Benzhydryl-4-methyl-3-nitrobenzamide329940-09-2C21H18N2O3
- 2-Hydroxy-N-[(E)-(3-phenylmethoxyphenyl)methylideneamino]benzamide316131-42-7C21H18N2O3
- 3-(4-Methylphenyl)-2-propan-2-ylchromeno[2,3-d]pyrimidine-4,5-dione896850-63-8C21H18N2O3
- 2-(3,4-Dimethylphenyl)-2-oxo-1-phenylethyl 2-pyrazinecarboxylate516467-22-4C21H18N2O3
- 1-(2-Methoxydibenzofuran-3-yl)-3-(3-methylphenyl)urea445015-01-0C21H18N2O3
- 1-(1,1'-Biphenyl)-4-YL-3-(3-nitroanilino)-1-propanone477333-92-9C21H18N2O3
- N'-(2-(Benzyloxy)benzylidene)-4-hydroxybenzohydrazide303083-69-4C21H18N2O3
- N-(4-Hydroxyphenyl)-4-[(phenylacetyl)amino]benzamide717828-18-7C21H18N2O3
- 2-Oxo-2-(phenylamino)ethyl 2-(phenylamino)benzoate176447-35-1C21H18N2O3
- 2-[(4-Methoxybenzoyl)amino]-N-phenylbenzamide42223-13-2C21H18N2O3
- N,N-Dibenzyl-3-nitrobenzamide57409-29-7C21H18N2O3
- 2-[(2-Methoxybenzoyl)amino]-N-phenylbenzamide708990-56-1C21H18N2O3
- N'-(3-(Benzyloxy)benzylidene)-4-hydroxybenzohydrazide386284-06-6C21H18N2O3
- N-(2-Methyl-3-nitrophenyl)-2,2-diphenylacetamide315669-91-1C21H18N2O3
- 2-[(Phenoxyacetyl)amino]-N-phenylbenzamide102311-59-1C21H18N2O3
- 2-((1,1'-Biphenyl)-4-yloxy)-N'-(2-hydroxybenzylidene)acetohydrazide303087-01-6C21H18N2O3
- 3,11-Di-furan-2-yl-2,3,4,5,10,11-hexahydro-dibenzo[b,e][1,4]diazepin-1-one312621-93-5C21H18N2O3
- 7-Methoxy-2,8-dimethyl-3-(1-phenyl-1H-pyrazol-4-yl)-4H-chromen-4-one385401-59-2C21H18N2O3
- N-[3-[(2-Phenoxyacetyl)amino]phenyl]benzamide423732-64-3C21H18N2O3
- 2-(Naphthalen-1-yl)-N-(5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)acetamide922078-72-6C21H18N2O3
- Furan-2-yl(5-(2-methoxyphenyl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl)methanone899724-56-2C21H18N2O3
- N-(1-Ethyl-2-oxo-1,2-dihydrobenzo[cd]indol-6-yl)-3-methoxybenzamide307509-48-4C21H18N2O3
- N-[4-(5-Isopropyl-1,3-benzoxazol-2-yl)phenyl]-2-furamide364738-57-8C21H18N2O3
- (E)-2-Cyano-3-(2-ethoxynaphthalen-1-yl)-N-(furan-2-ylmethyl)prop-2-enamide340319-54-2C21H18N2O3
- N-Cyclohexyl-6-oxo-6H-anthra[1,9-CD]isoxazole-3-carboxamide100440-78-6C21H18N2O3
- 3-(Acetylamino)phenyl diphenylcarbamate825608-24-0C21H18N2O3
- 2-Bis((2-hydroxyphenylmethylene)amino)methylphenol99875-17-9C21H18N2O3
- 5H-Pyrrolo(1,2-d)(1,4)benzodiazepine-5-acetic acid, 6,7-dihydro-6-oxo-, phenylmethyl ester, (S)-147528-08-3C21H18N2O3
- 5-(Furan-2-yl)-7-methoxy-2-phenyl-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazine899746-33-9C21H18N2O3
- 3-(Benzo[d][1,3]dioxol-5-ylmethyl)-1,1-diphenylurea927641-09-6C21H18N2O3
- Methyl 5-[6-methyl-1-(phenylmethyl)-1H-indazol-3-yl]-2-furancarboxylate170632-14-1C21H18N2O3
- 2-Ethyl-3-phenethyl-3H-chromeno[2,3-d]pyrimidine-4,5-dione896853-84-2C21H18N2O3
- Benzenepropanoic acid, alpha-(2-hydroxy-5-(phenylazo)phenyl)-115973-52-9C21H18N2O3
- N-(2-Benzoyl-1,2,3,4-tetrahydroisoquinolin-7-yl)furan-2-carboxamide955671-57-5C21H18N2O3
- Ethyl 6-amino-5-cyano-2,4-diphenyl-4H-pyran-3-carboxylate73035-26-4C21H18N2O3
- N'-(2-Phenoxyacetyl)-4-biphenylcarbohydrazide316135-93-0C21H18N2O3
- Ethyl 2-amino-4-(pyridin-3-yl)-4H-benzo[h]chromene-3-carboxylate1272756-49-6C21H18N2O3
- 3-[3-(6-Quinolinyloxy)propyl]-1H-indole-2-carboxylic acid1415968-41-0C21H18N2O3
- N-[4-[(2-Phenoxyacetyl)amino]phenyl]benzamide312755-44-5C21H18N2O3
- Benzyl 6-amino-5-cyano-2-methyl-4-phenyl-4H-pyran-3-carboxylate300589-42-8C21H18N2O3
- 3-[1-(Furan-2-yl)-2-nitroethyl]-1-methyl-2-phenyl-1H-indole307543-38-0C21H18N2O3
- 7-Ethyl-3-hydroxy-2-[(1H-indol-3-yl)methyl]quinoline-4-carboxylic acid924634-75-3C21H18N2O3
- 8-Ethyl-3-hydroxy-2-[(1H-indol-3-yl)methyl]quinoline-4-carboxylic acid924634-59-3C21H18N2O3
- 1-(2-(Furan-3-yl)quinazolin-4-yl)-1-(4-methoxyphenyl)ethan-1-ol2417738-36-2C21H18N2O3
- 2-[5-(3,4-Dimethoxyphenyl)-1H-pyrazol-3-yl]naphthalen-1-ol371213-22-8C21H18N2O3
- 6-Ethyl-7-hydroxy-2-methyl-3-(1-phenyl-1H-pyrazol-4-yl)-4H-chromen-4-one431915-88-7C21H18N2O3
- [2-(1,3-Benzodioxol-5-yl)quinolin-4-yl]-pyrrolidin-1-ylmethanone438473-22-4C21H18N2O3
- Naphthalen-2-yl N-[2-(5-hydroxy-1H-indol-3-yl)ethyl]carbamate1002101-05-4C21H18N2O3
- 4-Acetamido-N-(2-hydroxy-5-phenylphenyl)benzamide1013620-98-8C21H18N2O3
- 4-[Benzyl(pyridin-2-yl)carbamoyl]phenyl acetate329930-62-3C21H18N2O3
- 4-Acetamidophenyl diphenylcarbamate329227-89-6C21H18N2O3
- N,N-Dibenzyl-2-nitrobenzamide57409-27-5C21H18N2O3
- Methyl 2-[2-(1H-indol-3-yl)ethyl]-1-oxo-1,2-dihydro-4-isoquinolinecarboxylate383148-69-4C21H18N2O3
- Ethyl 3-amino-1-(pyridin-4-yl)-1H-benzo[f]chromene-2-carboxylate332859-70-8C21H18N2O3
- 3-[(4-Methoxyphenyl)amino]-1-(naphthalen-1-yl)pyrrolidine-2,5-dione1009707-64-5C21H18N2O3
- 4-Hydroxy-6-methyl-3-(2-phenyl-2,3-dihydro-1H-1,5-benzodiazepin-4-yl)-2H-pyran-2-one228864-87-7C21H18N2O3
- N-[4-(1,3-Dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl)phenyl]benzamide352672-29-8C21H18N2O3
- RefChem:382047857-90-9C21H18N2O3
- 2-(Diphenylamino)-2-oxoethyl 4-aminobenzoate931213-15-9C21H18N2O3
- 3-(1,3-Dioxo-1,3,3a,4,7,7a-hexahydro-2H-isoindol-2-yl)-N-phenylbenzamide143725-79-5C21H18N2O3
- 2-[1-Benzoyl-5-(2-furyl)-4,5-dihydro-1H-pyrazol-3-yl]phenyl methyl ether438482-02-1C21H18N2O3
- 2-Acetamidophenyl N,N-diphenylcarbamate332389-19-2C21H18N2O3
- 3-[(4-Nitrophenyl)amino]-1,3-diphenyl-1-propanone804-20-6C21H18N2O3
- N-(1-Ethyl-2-oxo-1,2-dihydrobenzo[cd]indol-6-yl)-4-methoxybenzamide313506-16-0C21H18N2O3
- N'-(4-Methoxybenzoyl)-4-phenylbenzohydrazide304452-56-0C21H18N2O3
- 2-(2-(7,8-Dimethyl-2-oxo-1,2-dihydroquinolin-3-yl)ethyl)isoindoline-1,3-dione851408-40-7C21H18N2O3
- N-[3-(1,3-Dioxo-1,3,3a,4,7,7a-hexahydro-2H-isoindol-2-yl)phenyl]benzamide355402-04-9C21H18N2O3
- N-(1-Ethyl-2-oxo-1,2-dihydrobenzo[cd]indol-6-yl)-2-methoxybenzamide313275-96-6C21H18N2O3
- (6-Oxo-7,12,12b,13-tetrahydro-6H-pyrido[1,2-a164230-00-6C21H18N2O3
- N-(2-Methyl-4-nitrophenyl)-2,2-diphenylacetamide339220-00-7C21H18N2O3
- 2-Phenyl-4-((phenylamino)methyl)-3a,4,7,7a-tetrahydro-1H-4,7-epoxyisoindole-1,3(2H)-dione1005262-80-5C21H18N2O3
- Furan-2-yl-[3-(2-hydroxyphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]methanone868155-47-9C21H18N2O3
- 2-Amino-4-[5-(4-methylphenyl)furan-2-yl]-5-oxo-4,6,7,8-tetrahydrochromene-3-carbonitrile609335-40-2C21H18N2O3
- N-[(1,2-Dimethylindol-5-yl)methyl]-2-oxochromene-3-carboxamide852137-87-2C21H18N2O3
- 3-(4-Methoxyphenyl)-1-(2-methylpropanoyl)-1H,4H-indeno[1,2-c]pyrazol-4-one206983-16-6C21H18N2O3
- 2-[(4,6-Dimethyl-2-pyrimidinyl)oxy]-3,3-diphenyl-2-propenoic Acid1312092-82-2C21H18N2O3
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 Dihydrorhodamine 123, N'-(4-(Benzyloxy)benzylidene)-4-hydroxybenzohydrazide, 4-[[2-(4-Phenylphenoxy)acetyl]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 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.