Molecular formula
C19H15N5O2
113 compounds have this formula on CompoundList.
- Molar mass
- 345.36g/mol
- Monoisotopic mass
- 345.1226Da
- Atoms
- 41
- Elements
- 4
- Rings plus double bonds
- 15
The formula C19H15N5O2 describes a molecule made of 19 carbon atoms, 15 hydrogen atoms, 5 nitrogen atoms and 2 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 × 1966.08%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 154.38%1.008 × 15 = 15.120 g/mol
- N Nitrogen × 520.28%14.007 × 5 = 70.035 g/mol
- O Oxygen × 29.27%15.999 × 2 = 31.998 g/mol
Look up another formula
Compounds with the formula C19H15N5O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 113 compounds
2-(3-Methoxyphenyl)-N-(1,2,4-triazol-4-yl)quinoline-4-carboxamide
CAS 353784-65-3C19H15N5O2
![4-[(1-Benzylpyrazolo[3,4-d]pyrimidin-4-yl)amino]benzoic acid chemical structure, C19H15N5O2, CAS 333324-92-8](/s/UPDHHXUNXOCMQA-UHFFFAOYSA-N.svg)
4-[(1-Benzylpyrazolo[3,4-d]pyrimidin-4-yl)amino]benzoic acid
CAS 333324-92-8C19H15N5O2
![3-Benzyl-6-phenacyltriazolo[4,5-d]pyrimidin-7-one chemical structure, C19H15N5O2, CAS 863018-37-5](/s/LPJUCUOCBRZUDZ-UHFFFAOYSA-N.svg)
3-Benzyl-6-phenacyltriazolo[4,5-d]pyrimidin-7-one
CAS 863018-37-5C19H15N5O2
(E)-N'-(2-Oxoindolin-3-ylidene)-3-(p-tolyl)-1H-pyrazole-5-carbohydrazide
CAS 306304-13-2C19H15N5O2
![N-(1,3-Benzodioxol-5-ylmethyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine chemical structure, C19H15N5O2, CAS 393820-13-8](/s/CDLUFNXOJDOGPA-UHFFFAOYSA-N.svg)
N-(1,3-Benzodioxol-5-ylmethyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine
CAS 393820-13-8C19H15N5O2
![3-Oxo-3-phenyl-N-(pyridin-3-yl)-2-[2-(pyridin-3-yl)hydrazin-1-ylidene]propanamide chemical structure, C19H15N5O2, CAS 314245-15-3](/s/STNYRVYWBLPDKL-ZIXFRUBKSA-N.svg)
3-Oxo-3-phenyl-N-(pyridin-3-yl)-2-[2-(pyridin-3-yl)hydrazin-1-ylidene]propanamide
CAS 314245-15-3C19H15N5O2
![3-(4-Methylphenyl)-6-phenacyltriazolo[4,5-d]pyrimidin-7-one chemical structure, C19H15N5O2, CAS 863019-49-2](/s/AKQPPAICWFZEKH-UHFFFAOYSA-N.svg)
3-(4-Methylphenyl)-6-phenacyltriazolo[4,5-d]pyrimidin-7-one
CAS 863019-49-2C19H15N5O2
![1-Benzyl-2-imino-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2,3-d]pyrimidine-3-carboxamide chemical structure, C19H15N5O2, CAS 690693-90-4](/s/IZMBZGJPJJNMPS-UHFFFAOYSA-N.svg)
1-Benzyl-2-imino-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2,3-d]pyrimidine-3-carboxamide
CAS 690693-90-4C19H15N5O2
2-(1,3-Benzoxazol-2-ylamino)-4-methyl-N-phenylpyrimidine-5-carboxamide
CAS 835897-77-3C19H15N5O2
![N-Cyclopropyl-5-oxo-3-phenyl-4,5-dihydro-[1,2,3]triazolo[1,5-a]quinazoline-8-carboxamide chemical structure, C19H15N5O2, CAS 1031664-22-8](/s/BPLCUMCEQNOXLD-UHFFFAOYSA-N.svg)
N-Cyclopropyl-5-oxo-3-phenyl-4,5-dihydro-[1,2,3]triazolo[1,5-a]quinazoline-8-carboxamide
CAS 1031664-22-8C19H15N5O2
![5-Nitro-2-(pyridin-2-yl)-1-(2-(pyridin-4-yl) ethyl)-1H-benzo[d]imidazole chemical structure, C19H15N5O2, CAS 80477-85-6](/s/DPWNICJBRRYQIR-UHFFFAOYSA-N.svg)
5-Nitro-2-(pyridin-2-yl)-1-(2-(pyridin-4-yl) ethyl)-1H-benzo[d]imidazole
CAS 80477-85-6C19H15N5O2
![N-(3-([1,2,4]Triazolo[4,3-b]pyridazin-6-yl)phenyl)-2-phenoxyacetamide chemical structure, C19H15N5O2, CAS 877635-19-3](/s/PECYTSIYEQNUDJ-UHFFFAOYSA-N.svg)
N-(3-([1,2,4]Triazolo[4,3-b]pyridazin-6-yl)phenyl)-2-phenoxyacetamide
CAS 877635-19-3C19H15N5O2
![N-(4-Oxo-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)-2-phenylacetamide chemical structure, C19H15N5O2, CAS 899752-79-5](/s/LWLILFQIRNILHC-UHFFFAOYSA-N.svg)
N-(4-Oxo-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)-2-phenylacetamide
CAS 899752-79-5C19H15N5O2
![3-(4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)-N-(quinolin-5-yl)propanamide chemical structure, C19H15N5O2, CAS 921162-24-5](/s/NHBHIZUWNSREBF-UHFFFAOYSA-N.svg)
3-(4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)-N-(quinolin-5-yl)propanamide
CAS 921162-24-5C19H15N5O2
![N-[3-(Imidazo[1,2-b]pyridazin-6-yloxy)phenyl]-N'-phenylurea chemical structure, C19H15N5O2, CAS 1005781-50-9](/s/DUACVOORSOOZRH-UHFFFAOYSA-N.svg)
N-[3-(Imidazo[1,2-b]pyridazin-6-yloxy)phenyl]-N'-phenylurea
CAS 1005781-50-9C19H15N5O2
![Ethyl 7-phenyl-2-pyridin-3-yl[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate chemical structure, C19H15N5O2, CAS 908499-07-0](/s/RFFPANRXCFKBKK-UHFFFAOYSA-N.svg)
Ethyl 7-phenyl-2-pyridin-3-yl[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylate
CAS 908499-07-0C19H15N5O2
![[(3Z)-2-Oxo-3-{[4-(pyridin-3-yl)-1H-pyrrol-2-yl]methylidene}-2,3-dihydro-1H-indol-5-yl]urea chemical structure, C19H15N5O2, CAS 1056225-10-5](/s/XROQQHOCADBSBW-PXNMLYILSA-N.svg)
[(3Z)-2-Oxo-3-{[4-(pyridin-3-yl)-1H-pyrrol-2-yl]methylidene}-2,3-dihydro-1H-indol-5-yl]urea
CAS 1056225-10-5C19H15N5O2
![[(3Z)-2-Oxo-3-[pyridin-4-yl(1H-pyrrol-2-yl)methylidene]-2,3-dihydro-1H-indol-5-yl]urea chemical structure, C19H15N5O2, CAS 946843-68-1](/s/FMNMEFQOIDZYMS-MSUUIHNZSA-N.svg)
[(3Z)-2-Oxo-3-[pyridin-4-yl(1H-pyrrol-2-yl)methylidene]-2,3-dihydro-1H-indol-5-yl]urea
CAS 946843-68-1C19H15N5O2
![1-Methyl-6-phenyl-3-(p-tolyl)pyrimido[5,4-e][1,2,4]triazine-5,7(1H,6H)-dione chemical structure, C19H15N5O2, CAS 148613-63-2](/s/PMGSJHIEYJFMAG-UHFFFAOYSA-N.svg)
1-Methyl-6-phenyl-3-(p-tolyl)pyrimido[5,4-e][1,2,4]triazine-5,7(1H,6H)-dione
CAS 148613-63-2C19H15N5O2
![3-Ethoxy-4-phenyl-2-(2H-tetrazol-5-yl)-4H-furo[3,2-b]indole chemical structure, C19H15N5O2, CAS 89224-87-3](/s/JOINTFUOXCQRLQ-UHFFFAOYSA-N.svg)
3-Ethoxy-4-phenyl-2-(2H-tetrazol-5-yl)-4H-furo[3,2-b]indole
CAS 89224-87-3C19H15N5O2
![2-(4-Oxo-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)-N-phenylacetamide chemical structure, C19H15N5O2, CAS 656831-69-5](/s/NBCNJNUYVBWEDL-UHFFFAOYSA-N.svg)
2-(4-Oxo-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)-N-phenylacetamide
CAS 656831-69-5C19H15N5O2
N-(2-Furylmethyl)-1-phenyl-5-pyridin-2-yl-1H-1,2,3-triazole-4-carboxamide
CAS 1396767-76-2C19H15N5O2
2-Amino-4-(4-nitrophenyl)-4a,5,6,7-tetrahydro-4H-naphthalene-1,3,3-tricarbonitrile
CAS 77198-46-0C19H15N5O2
3-Amino-2-(4-nitrophenyl)-6,7,8,8a-tetrahydro-1H-naphthalene-1,2,4-tricarbonitrile
CAS 489404-86-6C19H15N5O2
- 3-(3-Methylphenyl)-6-phenacyltriazolo[4,5-d]pyrimidin-7-one872591-06-5C19H15N5O2
- N-(1H-Benzo[d]imidazol-2-yl)-2-(6-oxo-3-phenylpyridazin-1(6H)-yl)acetamide1232793-72-4C19H15N5O2
- N-(Benzo[d][1,3]dioxol-5-ylmethyl)-3-(pyridin-3-yl)imidazo[1,2-b]pyridazin-6-amine1012344-10-3C19H15N5O2
- N-[(3-Methyl-4-oxo-3,4-dihydrophthalazin-1-yl)methyl]quinoxaline-2-carboxamide1396765-30-2C19H15N5O2
- 2-(1H-Benzo[d]imidazol-1-yl)-N-(2-(6-oxo-1,6-dihydropyridazin-3-yl)phenyl)acetamide1448029-61-5C19H15N5O2
- Pyrazolo(1,5-a)pyrimidine-6-carboxamide, 1,7-dihydro-5-methyl-7-oxo-1-phenyl-N-2-pyridinyl-87948-58-1C19H15N5O2
- 1-(4-Nitrophenyl)-3,5-diphenylformazan16580-57-7C19H15N5O2
- 8-Oxo-9-phenyl-2-(o-tolyl)-8,9-dihydro-7H-purine-6-carboxamide887216-81-1C19H15N5O2
- 5-Phenyl-N-((3-phenyl-1,2,4-oxadiazol-5-yl)methyl)-1H-pyrazole-3-carboxamide1238857-55-0C19H15N5O2
- N-(2-(1H-Pyrrol-1-yl)quinolin-8-yl)-1-methyl-6-oxo-1,6-dihydropyridazine-3-carboxamide1251576-96-1C19H15N5O2
- N-(1H-Benzo[d]imidazol-2-yl)-3-((6-methylpyridazin-3-yl)oxy)benzamide1251685-73-0C19H15N5O2
- [4-(4-Methylbenzyl)-1,5-dioxo-4,5-dihydro[1,2,4]triazolo[4,3-a]quinazolin-2(1H)-yl]acetonitrile1358436-01-7C19H15N5O2
- N-(3-Cyanophenyl)-2-(4-methyl-6-oxo-2-(pyridin-4-yl)pyrimidin-1(6H)-yl)acetamide1421476-80-3C19H15N5O2
- N-(2-{Imidazo[1,2-a]pyridin-2-yl}phenyl)-1-methyl-6-oxo-1,6-dihydropyridazine-3-carboxamide1797642-55-7C19H15N5O2
- 2-(1H-Benzo[d]imidazole-5-carbonyl)-3,4-dihydro-1H-dipyrido[1,2-a:4',3'-d]pyrimidin-11(2H)-one2034505-62-7C19H15N5O2
- 6-Hydroxy-N-(3-(8-methylimidazo[1,2-a]pyridin-2-yl)phenyl)pyrimidine-4-carboxamide2034255-73-5C19H15N5O2
- N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1-phenylpyrazolo[3,4-d]pyrimidin-4-amine853744-81-7C19H15N5O2
- Pyrazolo(1,5-a)pyrimidine-6-carboxamide, 1,7-dihydro-N-(4-methyl-2-pyridinyl)-7-oxo-1-phenyl-87948-63-8C19H15N5O2
- Pyrazolo(1,5-a)pyrimidine-6-carboxamide, 1,7-dihydro-N-(6-methyl-2-pyridinyl)-7-oxo-1-phenyl-87948-64-9C19H15N5O2
- Pyrazolo(1,5-a)pyrimidine-6-carboxamide, 1,7-dihydro-3-methyl-7-oxo-1-phenyl-N-2-pyridinyl-87948-68-3C19H15N5O2
- Pyrazolo(1,5-a)pyrimidine-6-carboxamide, 1,7-dihydro-2-methyl-7-oxo-1-phenyl-N-2-pyridinyl-87949-26-6C19H15N5O2
- 5-Methyl-3-oxo-2-phenyl-N-(pyridin-3-yl)-3,5-dihydro-2H-pyrazolo[4,3-c]pyridine-7-carboxamide921880-36-6C19H15N5O2
- N-(4-Oxo-1-(p-tolyl)-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)benzamide900007-76-3C19H15N5O2
- 2-(4-Oxo-3,4-dihydroquinazolin-3-yl)-N-[4-(1H-pyrazol-3-yl)phenyl]acetamide1207057-32-6C19H15N5O2
- N-((4-Oxo-3,4-dihydrophthalazin-1-yl)methyl)-3-phenyl-1H-pyrazole-5-carboxamide1319206-45-5C19H15N5O2
- 2-(Naphthalen-1-yloxy)-N-[6-(1H-pyrazol-1-yl)pyrimidin-4-yl]acetamide1428355-80-9C19H15N5O2
- N-(1-Cyanocyclopropyl)-3-cyclopropyl-6-(pyridin-3-yl)-[1,2]oxazolo[5,4-b]pyridine-4-carboxamide1445572-76-8C19H15N5O2
- 6-Methoxy-N-{2-phenylimidazo[1,2-a]pyridin-3-yl}pyrimidine-4-carboxamide2034634-04-1C19H15N5O2
- Diazene, [(4-nitrophenyl)(phenylhydrazono)methyl]phenyl-6165-65-7C19H15N5O2
- 2-Methyl-N-(4-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)benzamide899752-31-9C19H15N5O2
- 3-Methyl-N-{4-oxo-1-phenyl-1H,4H,5H-pyrazolo[3,4-d]pyrimidin-5-yl}benzamide899996-14-6C19H15N5O2
- 4-Methyl-N-(4-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)benzamide899752-33-1C19H15N5O2
- 1-(4-Ethylphenyl)-3-(3-(pyridin-3-yl)-1,2,4-oxadiazol-5-yl)pyridazin-4(1H)-one1251603-02-7C19H15N5O2
- 1-(4-Ethylphenyl)-3-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)pyridazin-4(1H)-one1251648-12-0C19H15N5O2
- N-(4-Methyl-2-oxo-1,2-dihydroquinolin-7-yl)-2-phenyl-2H-1,2,3-triazole-4-carboxamide1251551-02-6C19H15N5O2
- 5-[3-(1H-Indazol-5-yl)-1,2,4-oxadiazol-5-yl]-2-[(1-methylethyl)oxy]benzonitrile1072947-68-2C19H15N5O2
- 5-[5-(6-Amino-pyridin-3-ylethynyl)-6-ethyl-pyrimidin-4-yl]-pyridine-2-carboxylic acid1321613-07-3C19H15N5O2
- Phenyl {3-[(4,6-diaminopyrimidin-5-yl)ethynyl]phenyl}carbamate857287-13-9C19H15N5O2
- N-(1H-Imidazol-2-yl)-2-[3-(naphthalen-2-yl)-6-oxopyridazin-1(6H)-yl]acetamide1401560-62-0C19H15N5O2
- 2-(3-(1H-Indol-1-yl)-6-oxopyridazin-1(6H)-yl)-N-(pyridin-2-yl)acetamide1797247-47-2C19H15N5O2
- 3-Cyano-N-(2-(6-(furan-2-yl)-1H-imidazo[1,2-b]pyrazol-1-yl)ethyl)benzamide1788543-46-3C19H15N5O2
- 2-(3-(4-((1H-Indazol-5-yl)amino)pyrimidin-2-yl)phenoxy)acetaldehyde1595291-68-1C19H15N5O2
- 3-((1-(Isoquinoline-1-carbonyl)pyrrolidin-3-yl)oxy)pyrazine-2-carbonitrile2034282-62-5C19H15N5O2
- N-{[2-(Furan-2-yl)pyridin-4-yl]methyl}-2-phenyl-2H-1,2,3-triazole-4-carboxamide2034593-51-4C19H15N5O2
- N-{[2-(Furan-2-yl)pyridin-3-yl]methyl}-2-phenyl-2H-1,2,3-triazole-4-carboxamide2034268-56-7C19H15N5O2
- 5-(1H-Indazole-3-carbonyl)-1,5,9-triazatricyclo[8.4.0.0^{3,8}]tetradeca-3(8),9,11,13-tetraen-2-one2034505-25-2C19H15N5O2
- N-(1H-Benzo[d]imidazol-2-yl)-6-(benzyloxy)pyrimidine-4-carboxamide2034256-76-1C19H15N5O2
- N-(2-(4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)ethyl)quinoline-6-carboxamide2034416-15-2C19H15N5O2
- N-{[3-(Furan-2-yl)pyrazin-2-yl]methyl}-3-(1H-pyrazol-1-yl)benzamide2034533-15-6C19H15N5O2
- N-{[5-(Furan-3-yl)pyridin-3-yl]methyl}-2-phenyl-2H-1,2,3-triazole-4-carboxamide2034313-93-2C19H15N5O2
- N-((5-(Furan-2-yl)pyridin-3-yl)methyl)-2-phenyl-2H-1,2,3-triazole-4-carboxamide2034466-28-7C19H15N5O2
- N-((3-(Furan-3-yl)pyrazin-2-yl)methyl)-3-(1H-pyrazol-1-yl)benzamide2034236-87-6C19H15N5O2
- N-(2-(4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)ethyl)quinoline-2-carboxamide2034311-05-0C19H15N5O2
- N-(2-(4-Oxobenzo[d][1,2,3]triazin-3(4H)-yl)ethyl)isoquinoline-1-carboxamide2034531-53-6C19H15N5O2
- 7-Nitro-2-pyridin-2-yl-1-(2-pyridin-4-ylethyl)benzimidazole80477-87-8C19H15N5O2
- 7-Nitro-2-pyridin-2-yl-1-(2-pyridin-2-ylethyl)benzimidazole80477-86-7C19H15N5O2
- 5-Nitro-2-pyridin-2-yl-1-(2-pyridin-2-ylethyl)benzimidazole80477-84-5C19H15N5O2
- Diazene, [(3-nitrophenyl)(phenylhydrazono)methyl]phenyl-51808-29-8C19H15N5O2
- 3-Methoxy-N-[3-([1,2,4]triazolo[4,3-b]pyridazin-6-yl)phenyl]benzamide891114-85-5C19H15N5O2
- N-[(5-Phenylfuran-2-yl)methyl]-4-(tetrazol-1-yl)benzamide1032226-19-9C19H15N5O2
- (4-(1H-Pyrazol-3-ylamino)quinazolin-2-yl)(2-methoxyphenyl)methanone1241914-74-8C19H15N5O2
- 5-Methoxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-pyridin-4-ylpyridazin-4(1H)-one1238696-31-5C19H15N5O2
- 2,5-Pyridinedicarboxamide, N2-[4-(2-phenyldiazenyl)phenyl]-1424624-17-8C19H15N5O2
- Methyl 3-(4-((1H-indazol-5-yl)amino)pyrimidin-2-yl)benzoate1595290-60-0C19H15N5O2
- (3-(1H-1,2,3-Triazol-1-yl)azetidin-1-yl)(3-phenylbenzo[c]isoxazol-5-yl)methanone2034379-95-6C19H15N5O2
- 2-(1,2-Benzoxazol-3-yl)-N-{[3-(pyridin-4-yl)pyrazin-2-yl]methyl}acetamide2097889-17-1C19H15N5O2
- (Z)-3-Hydroxy-3-phenyl-N-pyridin-3-yl-2-(pyridin-3-yldiazenyl)prop-2-enamideC19H15N5O2
- Diazene, (3-nitrophenyl)[phenyl(phenylhydrazono)methyl]-78818-67-4C19H15N5O2
- Tetrazolo[1,5-b]pyridazine-8-carboxylic acid, 6,7-diphenyl-, ethyl ester646996-79-4C19H15N5O2
- N-(4-((1-Phenyl-1H-pyrazolo[3,4-b]pyrazin-5-yl)oxy)phenyl)acetamide87595-06-0C19H15N5O2
- N-[Cyano[5-(formylamino)-1-phenyl-1H-imidazol-4-yl]methyl]benzamide122475-61-0C19H15N5O2
- 2-[(1E)-3-{4-[(E)-Phenyldiazenyl]phenyl}triaz-1-en-1-yl]benzoic acid135069-04-4C19H15N5O2
- 4-[5-(1H-Indazol-3-yl)-1,2,4-oxadiazol-3-yl]-1-phenylpyrrolidin-2-one1172362-69-4C19H15N5O2
- 4-[[4-(2-Methylimidazo[1,2-a]pyridin-3-yl)-2-pyrimidinyl]amino]benzoic acid1203678-60-7C19H15N5O2
- Methyl 4-((4-(imidazo[1,2-a]pyridin-3-yl)pyrimidin-2-yl)amino)benzoate1204525-85-8C19H15N5O2
- 3-[[4-(2-Methylimidazo[1,2-a]pyridin-3-yl)-2-pyrimidinyl]amino]benzoic acid1204525-82-5C19H15N5O2
Frequently asked questions
What is the molar mass of C19H15N5O2?
The molar mass of C19H15N5O2 is 345.36 g/mol, calculated from standard atomic weights for 19 carbon atoms, 15 hydrogen atoms, 5 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 345.1226 Da.
How many compounds have the formula C19H15N5O2?
CompoundList lists 113 compounds with the molecular formula C19H15N5O2, including 2-(3-Methoxyphenyl)-N-(1,2,4-triazol-4-yl)quinoline-4-carboxamide, 4-[(1-Benzylpyrazolo[3,4-d]pyrimidin-4-yl)amino]benzoic acid, 3-Benzyl-6-phenacyltriazolo[4,5-d]pyrimidin-7-one. 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 C19H15N5O2?
C19H15N5O2 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.