Molecular formula
C18H12N2O3
66 compounds have this formula on CompoundList.
- Molar mass
- 304.31g/mol
- Monoisotopic mass
- 304.0848Da
- Atoms
- 35
- Elements
- 4
- Rings plus double bonds
- 14
The formula C18H12N2O3 describes a molecule made of 18 carbon atoms, 12 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 × 1871.05%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 123.97%1.008 × 12 = 12.096 g/mol
- N Nitrogen × 29.21%14.007 × 2 = 28.014 g/mol
- O Oxygen × 315.77%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C18H12N2O3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 66 of 66 compounds
Tyrphostin AG 808
CAS 160953-95-7C18H12N2O3
7-Hydroxy-3-(1-phenyl-1H-pyrazol-4-yl)-chromen-4-one
CAS 61034-11-5C18H12N2O3
N-(2-Phenyl-1,3-benzoxazol-5-yl)furan-2-carboxamide
CAS 371116-39-1C18H12N2O3
2-(5-Methyl-3-phenyl-4-isoxazolyl)-4H-3,1-benzoxazin-4-one
CAS 866150-69-8C18H12N2O3
![3-[3-(4-Methylphenyl)-1,2,4-oxadiazol-5-yl]-2H-chromen-2-one chemical structure, C18H12N2O3, CAS 724446-43-9](/s/IUYYAIYFKXGKKS-UHFFFAOYSA-N.svg)
3-[3-(4-Methylphenyl)-1,2,4-oxadiazol-5-yl]-2H-chromen-2-one
CAS 724446-43-9C18H12N2O3
![3-[3-(3-Methylphenyl)-1,2,4-oxadiazol-5-yl]-2H-chromen-2-one chemical structure, C18H12N2O3, CAS 724446-51-9](/s/IBCRIDOPYUHQKM-UHFFFAOYSA-N.svg)
3-[3-(3-Methylphenyl)-1,2,4-oxadiazol-5-yl]-2H-chromen-2-one
CAS 724446-51-9C18H12N2O3
1-Hydroxy-3-naphthalen-1-yl-4-oxidoquinoxalin-4-ium-2-one
CAS 383898-69-9C18H12N2O3
![(5Z)-2-Hydroxy-4-methyl-6-oxo-5-[(5-phenylfuran-2-yl)methylidene]-5,6-dihydropyridine-3-carbonitrile chemical structure, C18H12N2O3, CAS 591239-68-8](/s/SNLNUUWCOAPJED-ZROIWOOFSA-N.svg)
(5Z)-2-Hydroxy-4-methyl-6-oxo-5-[(5-phenylfuran-2-yl)methylidene]-5,6-dihydropyridine-3-carbonitrile
CAS 591239-68-8C18H12N2O3
![2-[(3-Phenyl-1,2-oxazol-5-yl)methyl]isoindole-1,3-dione chemical structure, C18H12N2O3, CAS 478048-73-6](/s/PIIYZQZFHGWTAB-UHFFFAOYSA-N.svg)
2-[(3-Phenyl-1,2-oxazol-5-yl)methyl]isoindole-1,3-dione
CAS 478048-73-6C18H12N2O3
![N-[4-(1,3-Benzoxazol-2-yl)phenyl]furan-2-carboxamide chemical structure, C18H12N2O3, CAS 294891-57-9](/s/MSDONUFVMAPIOO-UHFFFAOYSA-N.svg)
N-[4-(1,3-Benzoxazol-2-yl)phenyl]furan-2-carboxamide
CAS 294891-57-9C18H12N2O3
![2-Methyl-3-phenyl-3H-chromeno[2,3-d]pyrimidine-4,5-dione chemical structure, C18H12N2O3, CAS 900258-53-9](/s/MZFLINSGPLPSMW-UHFFFAOYSA-N.svg)
2-Methyl-3-phenyl-3H-chromeno[2,3-d]pyrimidine-4,5-dione
CAS 900258-53-9C18H12N2O3
4-Methyl-7-(phthalazin-1-yloxy)-2H-chromen-2-one
CAS 379245-99-5C18H12N2O3
1,3-Dihydro-1-acetyl-3-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-2H-indol-2-one
CAS 82349-12-0C18H12N2O3
![2-(3-Hydroxyphenyl)-4-methylpyrrolo[3,4-c]quinoline-1,3-dione chemical structure, C18H12N2O3, CAS 355154-40-4](/s/PLPFDNRVMGJAIN-UHFFFAOYSA-N.svg)
2-(3-Hydroxyphenyl)-4-methylpyrrolo[3,4-c]quinoline-1,3-dione
CAS 355154-40-4C18H12N2O3
![3-[3-(2-Methylphenyl)-1,2,4-oxadiazol-5-yl]-2H-chromen-2-one chemical structure, C18H12N2O3, CAS 892755-73-6](/s/CLSBBDXAAFCPSN-UHFFFAOYSA-N.svg)
3-[3-(2-Methylphenyl)-1,2,4-oxadiazol-5-yl]-2H-chromen-2-one
CAS 892755-73-6C18H12N2O3
![3-[5-(4-Methylphenyl)-1,3,4-oxadiazol-2-yl]-2H-chromen-2-one chemical structure, C18H12N2O3, CAS 302940-21-2](/s/BYOVHLGRJGKKNQ-UHFFFAOYSA-N.svg)
3-[5-(4-Methylphenyl)-1,3,4-oxadiazol-2-yl]-2H-chromen-2-one
CAS 302940-21-2C18H12N2O3
6-Methyl-3-(3-phenyl-1,2,4-oxadiazol-5-yl)-2H-chromen-2-one
CAS 950392-71-9C18H12N2O3
![6-Hydroxy-2-(pyridin-3-ylmethyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione chemical structure, C18H12N2O3, CAS 618408-46-1](/s/UJNQCAIRIJQUPS-UHFFFAOYSA-N.svg)
6-Hydroxy-2-(pyridin-3-ylmethyl)-1H-benzo[de]isoquinoline-1,3(2H)-dione
CAS 618408-46-1C18H12N2O3
![N-[2-(1,3-Benzoxazol-2-yl)phenyl]furan-2-carboxamide chemical structure, C18H12N2O3, CAS 477500-34-8](/s/PITBRVMASAQJTP-UHFFFAOYSA-N.svg)
N-[2-(1,3-Benzoxazol-2-yl)phenyl]furan-2-carboxamide
CAS 477500-34-8C18H12N2O3
![(E)-1-(Benzo[d][1,3]dioxol-5-yl)-3-(quinoxalin-6-yl)prop-2-en-1-one chemical structure, C18H12N2O3, CAS 1357063-33-2](/s/DLTKYVRDIHVYMD-GORDUTHDSA-N.svg)
(E)-1-(Benzo[d][1,3]dioxol-5-yl)-3-(quinoxalin-6-yl)prop-2-en-1-one
CAS 1357063-33-2C18H12N2O3
Xanthocillin Y1
CAS 38965-69-4C18H12N2O3
2-(1,3-Dioxoisoindol-2-yl)-N-(3-ethynylphenyl)acetamide
CAS 294891-35-3C18H12N2O3
![N-[4-(4-Cyanophenoxy)phenyl]furan-2-carboxamide chemical structure, C18H12N2O3, CAS 301207-72-7](/s/DVBSWOKSZHXQFF-UHFFFAOYSA-N.svg)
N-[4-(4-Cyanophenoxy)phenyl]furan-2-carboxamide
CAS 301207-72-7C18H12N2O3
2-((8-Hydroxyquinolin-5-yl)methyl)isoindoline-1,3-dione
CAS 72201-23-1C18H12N2O3
- 2-[(5-Phenyl-1,2-oxazol-3-yl)methyl]-2,3-dihydro-1H-isoindole-1,3-dione852180-49-5C18H12N2O3
- N-(1-Oxo-3H-2-benzofuran-5-yl)quinoline-2-carboxamide878443-79-9C18H12N2O3
- (E)-Methyl 4-(2-(benzo[d]oxazol-2-yl)-2-cyanovinyl)benzoate618390-24-2C18H12N2O3
- 4-(4-Formyl-2-pyrimidinyl)phenyl benzenecarboxylate477870-75-0C18H12N2O3
- 2-[(2-Oxo-1,2-dihydroquinolin-4-yl)methyl]-2,3-dihydro-1H-isoindole-1,3-dione1459834-28-6C18H12N2O3
- 3-(4-Methylphenyl)-2H-chromeno[2,3-d]pyrimidine-2,5(3H)-dione343375-22-4C18H12N2O3
- 3-{[4-(2,2-Dicyanoethenyl)phenoxy]methyl}benzoic acid347379-88-8C18H12N2O3
- (2E,4E)-2-Benzoyl-5-(2-nitrophenyl)penta-2,4-dienenitrile1025224-57-0C18H12N2O3
- 4-(2,2-Dicyanoethenyl)-2-methoxyphenyl benzoate340991-41-5C18H12N2O3
- (E)-1-(Benzo[d][1,3]dioxol-5-yl)-3-(quinoxalin-5-yl)prop-2-en-1-one1008350-85-3C18H12N2O3
- 2-[(2-Oxo-1,2-dihydroquinolin-3-yl)methyl]-2,3-dihydro-1H-isoindole-1,3-dione1332529-90-4C18H12N2O3
- Acetamide, N-(6-nitro-1-pyrenyl)-30268-98-5C18H12N2O3
- 3-Cyano-6-methoxy-4-phenylisoquinoline-1-carboxylic acid849547-30-4C18H12N2O3
- 3-(4-Methoxyphenyl)-6H-[2]benzopyrano[4,3-c]pyridazin-6-one96825-72-8C18H12N2O3
- 8-Methyl-3-(3-phenyl-1,2,4-oxadiazol-5-yl)-2H-chromen-2-one931697-51-7C18H12N2O3
- N-(5-Methyl-1,2-oxazol-3-yl)-9-oxo-9H-fluorene-4-carboxamide1021212-74-7C18H12N2O3
- 4-(3-Quinoxalin-2-yl-acryloyl)-benzoic acid867167-21-3C18H12N2O3
- Acetamide, N-(8-nitro-1-pyrenyl)-30269-05-7C18H12N2O3
- 1,3-Dioxolo[4,5-g]isoquinoline-5-carbonitrile, 6-benzoyl-5,6-dihydro-39964-98-2C18H12N2O3
- 3-Isocyanato-2-(3-phenoxyphenoxy)pyridine185214-64-6C18H12N2O3
- (Z)-1-(4-Nitrophenyl)-3-quinolin-4-ylprop-2-en-1-one93656-30-5C18H12N2O3
- 2-Methoxy-7-(pyrimidin-5-yl)-9H-xanthen-9-one1215869-31-0C18H12N2O3
- 3-Nitro-10-phenyl-10H-phenoxazine71041-09-3C18H12N2O3
- 10-(4-Nitrophenyl)-10H-phenoxazine58736-93-9C18H12N2O3
- 6-(Furan-3-yl)-2-(6-oxonaphthalen-2(6H)-ylidene)-2,3-dihydropyrimidin-4(1H)-one651723-59-0C18H12N2O3
- 7-Hydroxy-2-[4-(1H-imidazol-1-yl)phenyl]-4H-chromen-4-one2413904-63-7C18H12N2O3
- Acetamide, N-(5-oxo-5H-benzo[a]phenoxazin-6-yl)-58907-74-7C18H12N2O3
- Acetamide, N-(2-nitro-3-fluoranthenyl)-88535-53-9C18H12N2O3
- 10-Oxo-2-phenyl-2,10-dihydro[1,2]oxazino[3,2-b]quinazoline-4-carbaldehyde107400-09-9C18H12N2O3
- Prop-2-yn-1-yl 2-(5-phenyl-1,3,4-oxadiazol-2-yl)benzoate56894-59-8C18H12N2O3
- 8-Cyano-3-methyl-1-oxo-2-phenyl-1,2-dihydro-isoquinoline-4-carboxylic acid1075715-46-6C18H12N2O3
- 2-[2-(4-Nitrophenyl)ethenyl]-4H-furo[3,2-B]indole61082-88-0C18H12N2O3
- 2-(7-Methoxy-2-quinolinyl)-1H-isoindole-1,3(2H)-dione49609-17-8C18H12N2O3
- 3-[5-(2-Methylphenyl)-1,3,4-oxadiazol-2-yl]-2H-chromen-2-one2741913-81-3C18H12N2O3
- 3-[5-(3-Methylphenyl)-1,3,4-oxadiazol-2-yl]-2H-chromen-2-one770746-84-4C18H12N2O3
- (1,3-Dioxo-1,3-diphenylpropan-2-yl)(hydroxy)propanedinitrile65305-73-9C18H12N2O3
- 2-[3-(1-Benzofuran-2-yl)phenyl]-5-hydroxy-1H-pyrimidin-6-one1333239-73-8C18H12N2O3
- N-(5-Oxo-5H-benzo[a]phenoxazin-10-yl)acetamide2219-05-8C18H12N2O3
- 2-{[1-(1-Benzofuran-2-yl)ethylidene]amino}-1H-isoindole-1,3(2H)-dione63160-29-2C18H12N2O3
- 4-Methoxy-N-(2-pyridyl)-1,8-naphthalimide26495-97-6C18H12N2O3
- 4-Methoxy-N-(4-pyridyl)-1,8-naphthalimide860018-24-2C18H12N2O3
- 4-Methoxy-N-(3-pyridyl)-1,8-naphthalimide860018-23-1C18H12N2O3
Frequently asked questions
What is the molar mass of C18H12N2O3?
The molar mass of C18H12N2O3 is 304.31 g/mol, calculated from standard atomic weights for 18 carbon atoms, 12 hydrogen atoms, 2 nitrogen atoms and 3 oxygen atoms. The monoisotopic mass is 304.0848 Da.
How many compounds have the formula C18H12N2O3?
CompoundList lists 66 compounds with the molecular formula C18H12N2O3, including Tyrphostin AG 808, 7-Hydroxy-3-(1-phenyl-1H-pyrazol-4-yl)-chromen-4-one, N-(2-Phenyl-1,3-benzoxazol-5-yl)furan-2-carboxamide. 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 C18H12N2O3?
C18H12N2O3 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.