Molecular formula
C21H16N2O3
116 compounds have this formula on CompoundList.
- Molar mass
- 344.37g/mol
- Monoisotopic mass
- 344.1161Da
- Atoms
- 42
- Elements
- 4
- Rings plus double bonds
- 15
The formula C21H16N2O3 describes a molecule made of 21 carbon atoms, 16 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 × 2173.24%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 164.68%1.008 × 16 = 16.128 g/mol
- N Nitrogen × 28.13%14.007 × 2 = 28.014 g/mol
- O Oxygen × 313.94%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C21H16N2O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 116 compounds
(E)-9-Hydroxy-N'-(2-hydroxybenzylidene)-9H-fluorene-9-carbohydrazide
CAS 325702-72-5C21H16N2O3
Ethyl 5-cyano-6-phenoxy-2-phenylpyridine-3-carboxylate
CAS 306980-14-3C21H16N2O3
1-Amino-4-((4-methoxyphenyl)amino)anthraquinone
CAS 23060-42-6C21H16N2O3
N-(1-Methyl-4-oxo-3-phenyl-1,4-dihydroquinolin-2-yl)furan-2-carboxamide
CAS 883959-01-1C21H16N2O3
![(1-Hydroxy-2-naphthyl)[1-(4-methoxyphenyl)-1H-pyrazol-4-yl]methanone chemical structure, C21H16N2O3, CAS 956169-99-6](/s/LLLTULSFLRBWJA-UHFFFAOYSA-N.svg)
(1-Hydroxy-2-naphthyl)[1-(4-methoxyphenyl)-1H-pyrazol-4-yl]methanone
CAS 956169-99-6C21H16N2O3
4-Methoxy-N-(2-phenyl-1,3-benzoxazol-5-yl)benzamide
CAS 301646-88-8C21H16N2O3
Rhodamine 123 free base
C21H16N2O3
![N-[4-(1,3-Benzoxazol-2-yl)phenyl]-2-methoxybenzamide chemical structure, C21H16N2O3, CAS 331446-81-2](/s/BBANVDKNMTWWBS-UHFFFAOYSA-N.svg)
N-[4-(1,3-Benzoxazol-2-yl)phenyl]-2-methoxybenzamide
CAS 331446-81-2C21H16N2O3
![2-Amino-5-oxo-4-(2-phenylethyl)-4H-pyrano[3,2-c]chromene-3-carbonitrile chemical structure, C21H16N2O3, CAS 275360-70-8](/s/KHPMGBSSLHRHRI-UHFFFAOYSA-N.svg)
2-Amino-5-oxo-4-(2-phenylethyl)-4H-pyrano[3,2-c]chromene-3-carbonitrile
CAS 275360-70-8C21H16N2O3
![N-[3-(1,3-Benzoxazol-2-yl)-4-hydroxyphenyl]-4-methylbenzamide chemical structure, C21H16N2O3, CAS 327051-14-9](/s/VYHHSOLPXFBPHC-UHFFFAOYSA-N.svg)
N-[3-(1,3-Benzoxazol-2-yl)-4-hydroxyphenyl]-4-methylbenzamide
CAS 327051-14-9C21H16N2O3
3-(4-Acetyl-phenyl)-4-(2-methyl-1H-indol-3-yl)-pyrrole-2,5-dione
CAS 1613633-78-5C21H16N2O3
![N-[4-(1,3-Benzoxazol-2-yl)-3-hydroxyphenyl]-3-methylbenzamide chemical structure, C21H16N2O3, CAS 327051-43-4](/s/GNVWIEXAJSAZES-UHFFFAOYSA-N.svg)
N-[4-(1,3-Benzoxazol-2-yl)-3-hydroxyphenyl]-3-methylbenzamide
CAS 327051-43-4C21H16N2O3
![N-[3-(1,3-Benzoxazol-2-yl)phenyl]-4-methoxybenzamide chemical structure, C21H16N2O3, CAS 431939-32-1](/s/GXHDSIKFNYDCCZ-UHFFFAOYSA-N.svg)
N-[3-(1,3-Benzoxazol-2-yl)phenyl]-4-methoxybenzamide
CAS 431939-32-1C21H16N2O3
N-(1,3-Benzodioxol-5-ylmethyl)-4-(1,3-benzoxazol-2-yl)aniline
CAS 312537-75-0C21H16N2O3
AE-848/11828079
CAS 5603-02-1C21H16N2O3
![4-(2-Furyl)-2-(2-oxopropoxy)-5,6-dihydrobenzo[h]quinoline-3-carbonitrile chemical structure, C21H16N2O3, CAS 724702-69-6](/s/ZNSXHPAUQOBJKS-UHFFFAOYSA-N.svg)
4-(2-Furyl)-2-(2-oxopropoxy)-5,6-dihydrobenzo[h]quinoline-3-carbonitrile
CAS 724702-69-6C21H16N2O3
1-(Benzyloxy)-3-phenylquinoxalin-2(1H)-one 4-oxide
CAS 372179-66-3C21H16N2O3
(4-(9-Acridinylamino)phenoxy)acetic acid
CAS 64895-14-3C21H16N2O3
![5-Methyl-N-(2-phenoxyphenyl)furo[3,2-b]pyridine-2-carboxamide chemical structure, C21H16N2O3, CAS 941881-43-2](/s/GDFCAUABPKOGAG-UHFFFAOYSA-N.svg)
5-Methyl-N-(2-phenoxyphenyl)furo[3,2-b]pyridine-2-carboxamide
CAS 941881-43-2C21H16N2O3
![1-[4-(Benzyloxy)phenyl]-1H-benzimidazole-5-carboxylic acid chemical structure, C21H16N2O3, CAS 452088-83-4](/s/SKWAXTSMPNUADM-UHFFFAOYSA-N.svg)
1-[4-(Benzyloxy)phenyl]-1H-benzimidazole-5-carboxylic acid
CAS 452088-83-4C21H16N2O3
![4-Methyl-N-(4-methyl-5-oxo-5H-chromeno[4,3-b]pyridin-2-yl)benzamide chemical structure, C21H16N2O3, CAS 851411-61-5](/s/UNGZUHORLSJZKB-UHFFFAOYSA-N.svg)
4-Methyl-N-(4-methyl-5-oxo-5H-chromeno[4,3-b]pyridin-2-yl)benzamide
CAS 851411-61-5C21H16N2O3
![6-[(7-Methoxy-4-quinolinyl)oxy]-1-naphthalenecarboxamide chemical structure, C21H16N2O3, CAS 861879-04-1](/s/ISVKXCPIKLZVQW-UHFFFAOYSA-N.svg)
6-[(7-Methoxy-4-quinolinyl)oxy]-1-naphthalenecarboxamide
CAS 861879-04-1C21H16N2O3
2-Methoxy-N-(2-phenyl-1,3-benzoxazol-5-yl)benzamide
CAS 301646-96-8C21H16N2O3
![N-[3-(1,3-Benzoxazol-2-yl)phenyl]-2-phenoxyacetamide chemical structure, C21H16N2O3, CAS 378767-58-9](/s/WSVCJHJFWZEKPY-UHFFFAOYSA-N.svg)
N-[3-(1,3-Benzoxazol-2-yl)phenyl]-2-phenoxyacetamide
CAS 378767-58-9C21H16N2O3
- (E)-4-(((3-Acetylphenyl)imino)methyl)phenyl picolinate405905-14-8C21H16N2O3
- N-(2-Methoxyphenyl)-3-phenyl-2,1-benzoxazole-5-carboxamide887349-34-0C21H16N2O3
- 2-(4-Benzyloxyphenyl)-1H-benzimidazole-5-carboxylic acid174422-18-5C21H16N2O3
- (E)-N-(1,2-Dihydroacenaphthylen-5-yl)-3-(4-nitrophenyl)acrylamide392326-10-2C21H16N2O3
- N-(9H-Fluoren-2-yl)-2-methyl-3-nitrobenzamide424796-40-7C21H16N2O3
- Carbonic acid, 5,7-dihydroindolo[2,3-b]carbazol-6-yl ethyl ester666752-30-3C21H16N2O3
- 3,4-Dihydro-4-[(5-hydroxybiphenyl-3-yl)carbonyl]-2(1H)-quinoxalinone1788884-33-2C21H16N2O3
- 9,10-Anthracenedione, 1-amino-4-[(methoxyphenyl)amino]-88653-15-0C21H16N2O3
- N-(4-Carbamoylphenyl)-9H-xanthene-9-carboxamide349084-63-5C21H16N2O3
- 5-(4-Aminophenoxy)-2-(4-methylphenyl)-1H-isoindole-1,3(2H)-dione296796-57-1C21H16N2O3
- 3-(2-(Naphthalen-1-yl)acetamido)benzofuran-2-carboxamide477511-70-9C21H16N2O3
- 1-Amino-4-((2-methoxyphenyl)amino)anthraquinone54946-80-4C21H16N2O3
- 5-(Phenoxymethyl)-N-(2-quinolinyl)-2-furamide924830-47-7C21H16N2O3
- Glycine, N-(benz(a)anthracen-7-ylcarbamoyl)-63018-50-8C21H16N2O3
- 2(1H)-Quinolinone, 1,1'-(2-oxo-1,3-propanediyl)bis-55170-66-6C21H16N2O3
- N-[3-(1,3-Benzoxazol-2-yl)-4-hydroxyphenyl]-2-phenylacetamide2532-94-7C21H16N2O3
- (E)-2-Cyano-3-(4-hydroxy-3-methoxyphenyl)-N-naphthalen-1-ylprop-2-enamide358395-44-5C21H16N2O3
- (E)-2-Cyano-3-(2-hydroxy-5-methoxyphenyl)-N-naphthalen-1-ylprop-2-enamide379730-99-1C21H16N2O3
- 2-[(E)-2-(Furan-2-yl)ethenyl]-3-(3-methoxyphenyl)quinazolin-4-one337496-90-9C21H16N2O3
- Glycine, N-(benz(a)anthracen-5-ylcarbamoyl)-63018-49-5C21H16N2O3
- 5-(3-Aminophenoxy)-2-(2-methylphenyl)isoindole-1,3-dione320368-67-0C21H16N2O3
- 2-Phenoxy-N-(2-phenyl-1,3-benzoxazol-5-yl)acetamide425662-40-4C21H16N2O3
- 2-Amino-4-(4-hydroxy-3-methoxyphenyl)-4H-benzo[h]chromene-3-carbonitrile331869-77-3C21H16N2O3
- 2-((3-(Benzyloxy)pyridin-2-yl)methyl)isoindoline-1,3-dione344569-80-8C21H16N2O3
- N-(2-Methyl-1,3-dioxoisoindolin-4-yl)-2-(naphthalen-2-yl)acetamide955849-92-0C21H16N2O3
- 6-Methyl-2-(4-phenoxyanilino)-3,1-benzoxazin-4-one282529-91-3C21H16N2O3
- 5-(4-Morpholinyl)naphtho(2,3-h)quinoline-7,12-dione22817-49-8C21H16N2O3
- (E)-3-(Furan-2-yl)-N-[2-(2-methylphenyl)-1,3-benzoxazol-5-yl]prop-2-enamide332063-80-6C21H16N2O3
- 3-(1,3-Dioxoisoindol-2-yl)-N-naphthalen-2-ylpropanamide428841-39-8C21H16N2O3
- 1,2-Benzenedicarboxylic acid, mono((diphenylmethylene)hydrazide)160282-35-9C21H16N2O3
- 3-Methyl-N-(4-methyl-5-oxo-5H-chromeno[4,3-b]pyridin-2-yl)benzamide851411-59-1C21H16N2O3
- N-(3-Methoxyphenyl)-3-phenyl-2,1-benzoxazole-5-carboxamide887349-32-8C21H16N2O3
- 3-(7-Methoxynaphthalen-2-yl)-1-phenyl-1H-pyrazole-4-carboxylic acid1208697-01-1C21H16N2O3
- Antiproliferative agent-263049662-97-4C21H16N2O3
- N-Benzyl-2-methyl-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxamide338417-60-0C21H16N2O3
- 2-[(E)-2-(Furan-2-yl)ethenyl]-3-(2-methoxyphenyl)quinazolin-4-one337496-88-5C21H16N2O3
- 2-(2-Oxo-1,3-benzoxazol-3-yl)-N-(2-phenylphenyl)acetamide886189-63-5C21H16N2O3
- 3-Methyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzamide922030-48-6C21H16N2O3
- N-(1,2-Dihydroacenaphthylen-5-yl)-2-(2-oxo-1,3-benzoxazol-3-yl)acetamide663167-94-0C21H16N2O3
- (E)-3-(Furan-2-yl)-N-[2-(3-methylphenyl)-1,3-benzoxazol-5-yl]prop-2-enamide346645-65-6C21H16N2O3
- (E)-N-(1,2-Dihydroacenaphthylen-5-yl)-3-(3-nitrophenyl)prop-2-enamide432015-03-7C21H16N2O3
- N-[(2-Oxo-1H-quinolin-3-yl)methyl]-N-phenylfuran-2-carboxamide714290-06-9C21H16N2O3
- N-(2-(Benzo[d]oxazol-2-yl)phenyl)-2-phenoxyacetamide477500-76-8C21H16N2O3
- N-(4-Methoxyphenyl)-3-phenyl-2,1-benzoxazole-5-carboxamide887349-30-6C21H16N2O3
- [3-Hydroxy-5-(1H-indol-4-yl)-phenyl]-(6-methoxy-pyridin-3-yl)-methanone915412-22-5C21H16N2O3
- 2-(5-(Benzofuran-2-yl)isoxazol-3-yl)-1-(indolin-1-yl)ethanone1105243-97-7C21H16N2O3
- 1-Amino-4-anilino-2-methoxyanthracene-9,10-dione90791-37-0C21H16N2O3
- 2-[(7-Methyl-4-oxopyrido[1,2-a]pyrimidin-2-yl)methoxy]naphthalene-1-carbaldehyde781629-60-5C21H16N2O3
- (E)-2-Cyano-3-(4-oxochromen-3-yl)-N-(2-phenylethyl)prop-2-enamide454250-17-0C21H16N2O3
- 2-[(4-Phenoxyphenoxy)methyl]-5-phenyl-1,3,4-oxadiazole879333-29-6C21H16N2O3
- 4-(4-Phenoxybenzoyl)-3,4-dihydroquinoxalin-2(1H)-one952812-51-0C21H16N2O3
- N-(10-Methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzamide922081-45-6C21H16N2O3
- 2-Methyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzamide921890-68-8C21H16N2O3
- N-(8-Methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzamide922083-75-8C21H16N2O3
- 4-(4-Cbz-Aminopheny)-2-cyanophenol1261965-44-9C21H16N2O3
- 5-(4-Cbz-Aminopheny)-2-cyanophenol1261930-06-6C21H16N2O3
- Benzyl N-[4-(3-cyano-5-hydroxyphenyl)phenyl]carbamate1261994-75-5C21H16N2O3
- 3-[3-(2-Methoxy-phenyl)-1H-pyrrolo[2,3-b]pyridin-5-yl]-benzoic acid875639-29-5C21H16N2O3
- 2-(4-Nitrophenyl)-4,5-diphenyl-4,5-dihydro-1,3-oxazole7042-09-3C21H16N2O3
- 1H-Pyrazole-4-acetic acid, 5-(2-furanyl)-1,3-diphenyl-36664-52-5C21H16N2O3
- 3,4-Dihydroxy-N-(2-(1H-indol-2-yl)-phenyl)-benzamide677297-13-1C21H16N2O3
- 6-Methyl-2-(4-phenoxyphenyl)-1H-benzimidazole-4-carboxylic acid1248542-31-5C21H16N2O3
- 6-(4-Methoxyphenyl)-2-(6-oxonaphthalen-2(6H)-ylidene)-2,3-dihydropyrimidin-4(1H)-one651720-59-1C21H16N2O3
- 2-Propen-1-one, 3-(4-nitrophenyl)-1-[4-(phenylamino)phenyl]-88681-23-6C21H16N2O3
- N-(Furan-2-ylmethyl)-2-oxo-2-(2-phenylindolizin-3-yl)acetamide892693-03-7C21H16N2O3
- 5H-Benzo[a]phenoxazin-5-one, 9-(dimethylamino)-3-(2-propynyloxy)-633525-06-1C21H16N2O3
- 2,4(1H,3H)-Quinolinedione, 3-hydroxy-1-phenyl-3-(phenylamino)-61581-59-7C21H16N2O3
- 5-Methyl-N-(4-phenoxyphenyl)furo[3,2-b]pyridine-2-carboxamide941969-45-5C21H16N2O3
- N-{4-[Cyano(phenyl)methyl]phenyl}-2,6-dihydroxybenzamide61438-70-8C21H16N2O3
- (Z)-N-((5-(Benzofuran-2-yl)isoxazol-3-yl)methyl)-3-phenylacrylamide1105242-26-9C21H16N2O3
- 5-Hydroxy-1,3,5-triphenyl-2,4-imidazolidinedione1352131-39-5C21H16N2O3
- 3-Hydroxy-7-[(6-quinolinylamino)methyl]-2-naphthalenecarboxylic acid503827-99-4C21H16N2O3
- N,N-Dimethyl-4-(5-oxo-5H-[1]benzopyrano[2,3-b]pyridin-2-yl)benzamide1008119-08-1C21H16N2O3
- N-[2-(5-Methyl-2-furyl)phenyl]-4-oxo-1H-quinoline-3-carboxamide873053-24-8C21H16N2O3
- Methyl 2-methoxy-6-[4-[2-(3-pyridinyl)ethynyl]phenyl]-4-pyridinecarboxylate1244017-83-1C21H16N2O3
- Methyl 2-methoxy-5-[4-[2-(3-pyridinyl)ethynyl]phenyl]-3-pyridinecarboxylate1244020-52-7C21H16N2O3
Frequently asked questions
What is the molar mass of C21H16N2O3?
The molar mass of C21H16N2O3 is 344.37 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms, 2 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 344.1161 Da.
How many compounds have the formula C21H16N2O3?
CompoundList lists 116 compounds with the molecular formula C21H16N2O3, including (E)-9-Hydroxy-N'-(2-hydroxybenzylidene)-9H-fluorene-9-carbohydrazide, Ethyl 5-cyano-6-phenoxy-2-phenylpyridine-3-carboxylate, 1-Amino-4-((4-methoxyphenyl)amino)anthraquinone. 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 C21H16N2O3?
C21H16N2O3 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.