Molecular formula
C17H19N5O2
270 compounds have this formula on CompoundList.
- Molar mass
- 325.37g/mol
- Monoisotopic mass
- 325.1539Da
- Atoms
- 43
- Elements
- 4
- Rings plus double bonds
- 11
The formula C17H19N5O2 describes a molecule made of 17 carbon atoms, 19 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 × 1762.75%12.011 × 17 = 204.187 g/mol
- H Hydrogen × 195.89%1.008 × 19 = 19.152 g/mol
- N Nitrogen × 521.52%14.007 × 5 = 70.035 g/mol
- O Oxygen × 29.83%15.999 × 2 = 31.998 g/mol
Look up another formula
Compounds with the formula C17H19N5O2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 270 compounds
Pixantrone
CAS 144510-96-3C17H19N5O2
Piritrexim
CAS 72732-56-0C17H19N5O2
![2-Imino-1-isopropyl-N,10-dimethyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-A:2,3-D]pyrimidine-3-carboxamide chemical structure, C17H19N5O2, CAS 618072-30-3](/s/WDXKKHCTSLAHPJ-UHFFFAOYSA-N.svg)
2-Imino-1-isopropyl-N,10-dimethyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-A:2,3-D]pyrimidine-3-carboxamide
CAS 618072-30-3C17H19N5O2
Mivobulin
CAS 122332-18-7C17H19N5O2
CI 980
CAS 82585-92-0C17H19N5O2
![2-Imino-N,8-dimethyl-5-oxo-1-propan-2-yl-3-dipyrido[1,2-d:3',4'-f]pyrimidinecarboxamide chemical structure, C17H19N5O2, CAS 799251-03-9](/s/YJQZLBVSABEZBW-UHFFFAOYSA-N.svg)
2-Imino-N,8-dimethyl-5-oxo-1-propan-2-yl-3-dipyrido[1,2-d:3',4'-f]pyrimidinecarboxamide
CAS 799251-03-9C17H19N5O2
![N-Ethyl-2-imino-5-oxo-1-propyl-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide chemical structure, C17H19N5O2, CAS 489462-18-2](/s/BRJGOGRDSYGNOY-UHFFFAOYSA-N.svg)
N-Ethyl-2-imino-5-oxo-1-propyl-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide
CAS 489462-18-2C17H19N5O2
![Ethyl N-(5-amino-2-methyl-3-phenyl-1,2-dihydropyrido[3,4-b]pyrazin-7-yl)carbamate chemical structure, C17H19N5O2, CAS 83269-10-7](/s/XXBDOTXPQDVHIP-UHFFFAOYSA-N.svg)
Ethyl N-(5-amino-2-methyl-3-phenyl-1,2-dihydropyrido[3,4-b]pyrazin-7-yl)carbamate
CAS 83269-10-7C17H19N5O2
![N,1-Diethyl-2-imino-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-A:2,3-D]pyrimidine-3-carboxamide chemical structure, C17H19N5O2, CAS 489423-68-9](/s/GVSAJCKRQIGBFQ-UHFFFAOYSA-N.svg)
N,1-Diethyl-2-imino-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-A:2,3-D]pyrimidine-3-carboxamide
CAS 489423-68-9C17H19N5O2
![N-[1-(4-Nitrophenyl)ethylidene]-4-(2-pyridinyl)-1-piperazinamine chemical structure, C17H19N5O2, CAS 374677-28-8](/s/QFCSRGFPAOMMAE-RGEXLXHISA-N.svg)
N-[1-(4-Nitrophenyl)ethylidene]-4-(2-pyridinyl)-1-piperazinamine
CAS 374677-28-8C17H19N5O2
8-Allylamino-3-methyl-7-(3-methyl-benzyl)-3,7-dihydro-purine-2,6-dione
CAS 377055-79-3C17H19N5O2
![1-Methyl-9-phenethyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-quinone chemical structure, C17H19N5O2, CAS 714234-88-5](/s/AMNSXTYBGBTLBP-UHFFFAOYSA-N.svg)
1-Methyl-9-phenethyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-quinone
CAS 714234-88-5C17H19N5O2
![1,7-Dimethyl-9-(3-methylphenyl)-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione chemical structure, C17H19N5O2, CAS 713128-30-4](/s/VQTDKHCXXQEGKN-UHFFFAOYSA-N.svg)
1,7-Dimethyl-9-(3-methylphenyl)-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione
CAS 713128-30-4C17H19N5O2
![1,7-Dimethyl-9-(4-methylphenyl)-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione chemical structure, C17H19N5O2, CAS 714244-07-2](/s/ATXUCNCKDIBPJK-UHFFFAOYSA-N.svg)
1,7-Dimethyl-9-(4-methylphenyl)-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione
CAS 714244-07-2C17H19N5O2
![9-(3,5-Dimethylphenyl)-1-methyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione chemical structure, C17H19N5O2, CAS 713083-05-7](/s/BGBWUFPRLAEROT-UHFFFAOYSA-N.svg)
9-(3,5-Dimethylphenyl)-1-methyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione
CAS 713083-05-7C17H19N5O2
![2-(1-tert-Butyl-4-oxopyrazolo[3,4-d]pyrimidin-5-yl)-N-phenylacetamide chemical structure, C17H19N5O2, CAS 863447-62-5](/s/JPBDPANUZAOXJH-UHFFFAOYSA-N.svg)
2-(1-tert-Butyl-4-oxopyrazolo[3,4-d]pyrimidin-5-yl)-N-phenylacetamide
CAS 863447-62-5C17H19N5O2
![9-Benzyl-1,7-dimethyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione chemical structure, C17H19N5O2, CAS 714937-80-1](/s/TVVBNKJMZSIUKQ-UHFFFAOYSA-N.svg)
9-Benzyl-1,7-dimethyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione
CAS 714937-80-1C17H19N5O2
![2-[(6-Ethoxy-4-methylquinazolin-2-yl)amino]-5,6-dimethylpyrimidin-4(1H)-one chemical structure, C17H19N5O2, CAS 327103-39-9](/s/YAURPXLONXUWGZ-UHFFFAOYSA-N.svg)
2-[(6-Ethoxy-4-methylquinazolin-2-yl)amino]-5,6-dimethylpyrimidin-4(1H)-one
CAS 327103-39-9C17H19N5O2
2-(4,6-Dimethylpyrimidin-2-yl)imino-1-(4-ethoxyphenyl)imidazolidin-4-one
CAS 704876-51-7C17H19N5O2
![4-[7-(1-Phenoxyethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]morpholine chemical structure, C17H19N5O2, CAS 338403-69-3](/s/GJAAGHWHBIKINE-UHFFFAOYSA-N.svg)
4-[7-(1-Phenoxyethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl]morpholine
CAS 338403-69-3C17H19N5O2
2-(Dimethylamino)-6-oxo-4-(4-phenylpiperazino)-6H-1,3-oxazine-5-carbonitrile
CAS 477853-40-0C17H19N5O2
![N-(4-Isopropylbenzyl)-6-methyl-4-oxo-4,5-dihydro[1,2,3]triazolo[1,5-a]pyrazine-3-carboxamide chemical structure, C17H19N5O2, CAS 1775471-23-2](/s/IDGIEWISVNWMBM-UHFFFAOYSA-N.svg)
N-(4-Isopropylbenzyl)-6-methyl-4-oxo-4,5-dihydro[1,2,3]triazolo[1,5-a]pyrazine-3-carboxamide
CAS 1775471-23-2C17H19N5O2
![3-Ethyl-1-methyl-9-phenyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione chemical structure, C17H19N5O2, CAS 326918-94-9](/s/DHYQUSWIOMVUNM-UHFFFAOYSA-N.svg)
3-Ethyl-1-methyl-9-phenyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione
CAS 326918-94-9C17H19N5O2
![2-[(1-Methyl-1H-Benzimidazol-2-Yl)methyl]-6-Morpholin-4-Ylpyrimidin-4(3H)-One chemical structure, C17H19N5O2, CAS 1260544-15-7](/s/XLESLWHDVUIEMT-UHFFFAOYSA-N.svg)
2-[(1-Methyl-1H-Benzimidazol-2-Yl)methyl]-6-Morpholin-4-Ylpyrimidin-4(3H)-One
CAS 1260544-15-7C17H19N5O2
- N-(2-((3-(1H-Imidazol-1-yl)propyl)amino)-2-oxoethyl)-1H-indole-3-carboxamide1226443-40-8C17H19N5O2
- 1,3,7-Trimethyl-9-phenyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione844834-56-6C17H19N5O2
- 1,3-Dimethyl-9-(3-methylphenyl)-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione848866-58-0C17H19N5O2
- 2-Imino-N,8-dimethyl-5-oxo-1-propyl-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide876708-89-3C17H19N5O2
- Carbamic acid, (5-amino-1,2-dihydro-1-methyl-3-phenylpyrido(3,4-b)pyrazin-7-yl)-, ethyl ester83269-12-9C17H19N5O2
- 1 suppliersN^6-Benzyl-2',3'-dideoxyadenosine120503-63-1C17H19N5O2
- 5-(3,5-Dimethoxy-4-pyrrol-1-yl-benzyl)-pyrimidine-2,4-diamine71125-75-2C17H19N5O2
- (R)-2-((6-(3-Aminopiperidin-1-yl)-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)methyl)benzonitrile865758-98-1C17H19N5O2
- 6-Methyl-N-(1-methyl-3-phenylpropyl)-4-oxo-4,5-dihydro[1,2,3]triazolo[1,5-a]pyrazine-3-carboxamide1775528-61-4C17H19N5O2
- N-(1-(tert-Butyl)-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)-2-phenylacetamide899751-97-4C17H19N5O2
- Bbr 2828150629-26-8C17H19N5O2
- N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-1,3-dimethyl-1H-pyrazole-4-carboxamide1172778-76-5C17H19N5O2
- N-(5-(1,5-Dimethyl-1H-pyrazol-3-yl)-1,3,4-oxadiazol-2-yl)-2-(2,4-dimethylphenyl)acetamide1170386-78-3C17H19N5O2
- N6-4-Hydroxybenzyl-9-(2-tetrahydropyranyl)adenine1144854-41-0C17H19N5O2
- 5-Amino-1-[(2,5-dimethylphenyl)methyl]-N-(furan-2-ylmethyl)triazole-4-carboxamide899940-33-1C17H19N5O2
- N-Cyclopentyl-4-oxo-8-phenyl-4,6,7,8-tetrahydroimidazo[2,1-c][1,2,4]triazine-3-carboxamide941958-17-4C17H19N5O2
- N-[5-(2,4-Dimethylphenyl)-1,3,4-oxadiazol-2-yl]-1-ethyl-3-methyl-1H-pyrazole-5-carboxamide1170004-22-4C17H19N5O2
- N-((1-Cyclohexyl-1H-tetrazol-5-yl)methyl)benzofuran-2-carboxamide921503-70-0C17H19N5O2
- N-(2-(Cyclopropanecarbonyl)-1,2,3,4-tetrahydroisoquinolin-7-yl)-1-methyl-1H-1,2,3-triazole-4-carboxamide1448059-09-3C17H19N5O2
- 6-Benzyl-7-methyl-2-(morpholin-4-yl)[1,2,4]triazolo[1,5-a]pyrimidin-5(4H)-one1428139-66-5C17H19N5O2
- 2-(5,7-Dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-N-(2-ethoxyphenyl)acetamide879053-21-1C17H19N5O2
- N-(2-(5-(2-Methylbenzyl)-4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)acetamide921919-54-2C17H19N5O2
- N-(2-(5-(3-Methylbenzyl)-4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)acetamide922016-32-8C17H19N5O2
- 6-Ethyl-1,3-dimethyl-5-((pyridin-2-ylmethyl)amino)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione946305-21-1C17H19N5O2
- 5-[(4,8-Dimethoxy-2-methylquinolin-6-yl)methyl]pyrimidine-2,4-diamine89446-15-1C17H19N5O2
- 6-Ethyl-1,3-dimethyl-5-((pyridin-4-ylmethyl)amino)pyrido[2,3-d]pyrimidine-2,4(1H,3H)-dione946357-90-0C17H19N5O2
- 7-Allyl-8-(benzyl(methyl)amino)-3-methyl-1H-purine-2,6(3H,7H)-dione377051-02-0C17H19N5O2
- 1-Methyl-9-(4-methylbenzyl)-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione303972-89-6C17H19N5O2
- 6-(Furan-2-ylmethyl)-2-(4-methylpiperazin-1-yl)pyrido[4,3-d]pyrimidin-5(6H)-one925169-83-1C17H19N5O2
- N-Benzyl-4-(6-methoxy[1,2,4]triazolo[4,3-b]pyridazin-3-yl)butanamide1374545-85-3C17H19N5O2
- 8-(Allylamino)-7-benzyl-1,3-dimethyl-1H-purine-2,6(3H,7H)-dione333755-46-7C17H19N5O2
- 9-(4-Ethylphenyl)-1-methyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione713089-17-9C17H19N5O2
- 5-{[8-(2-Methoxyethoxy)quinolin-6-yl]methyl}pyrimidine-2,4-diamine89445-85-2C17H19N5O2
- 4-{[(1r,4r)-4-Hydroxycyclohexyl]amino}imidazo[1,2-a]quinoxaline-8-carboxamide1452864-23-1C17H19N5O2
- 2-[(4,6-Dimethylpyrimidin-2-yl)amino]-1-(4-ethoxyphenyl)-1H-imidazol-5-ol327107-28-8C17H19N5O2
- 1 suppliers1H-Pyrazole-1-propanoic acid, I2-cyclopentyl-4-(7H-pyrrolo(2,3-d)pyrimidin-4-yl)-, (I2R)-2102675-40-9C17H19N5O2
- 1-Methyl-8-phenyl-3-propyl-7,8-dihydro-1H-imidazo[2,1-f]purine-2,4(3H,6H)-dione330818-15-0C17H19N5O2
- 2-Imino-N,10-dimethyl-5-oxo-1-propyl-1,5-dihydro-2H-dipyrido[1,2-a:2,3-d]pyrimidine-3-carboxamide618071-99-1C17H19N5O2
- 3-Methyl-8-[(4-methylphenyl)methylamino]-7-prop-2-enylpurine-2,6-dione304880-13-5C17H19N5O2
- 2-(1-Methyl-4-oxopyrazolo[3,4-d]pyrimidin-5-yl)-N-(2,4,6-trimethylphenyl)acetamide866843-54-1C17H19N5O2
- 8-(Benzylamino)-7-[(E)-but-2-enyl]-3-methylpurine-2,6-dione305864-89-5C17H19N5O2
- 9-(3,4-Dimethylphenyl)-1-methyl-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione713129-31-8C17H19N5O2
- 2-Ethyl-4-methyl-6-(4-methylphenyl)-7,8-dihydropurino[7,8-a]imidazole-1,3-dione330818-17-2C17H19N5O2
- 7-Benzyl-3-methyl-8-pyrrolidin-1-ylpurine-2,6-dione377066-62-1C17H19N5O2
- 3-Methyl-7-[(2-methylphenyl)methyl]-8-(prop-2-enylamino)purine-2,6-dione876886-14-5C17H19N5O2
- 8-(4-Ethylphenyl)-1,3-dimethyl-7,8-dihydro-1H-imidazo[2,1-f]purine-2,4(3H,6H)-dione872840-41-0C17H19N5O2
- 9-(2,3-Dimethylphenyl)-1-methyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione923399-32-0C17H19N5O2
- 2-[(4,6-Dimethylpyrimidin-2-yl)amino]-1-(2-ethoxyphenyl)-4H-imidazol-5-one337494-19-6C17H19N5O2
- N'-(1-Butyl-2-oxo-1,2-dihydro-3H-indol-3-ylidene)-5-methyl-1H-pyrazole-3-carbohydrazide5654-10-4C17H19N5O2
- 8-(3,4-Dimethylphenyl)-1,3-dimethyl-7,8-dihydro-1H-imidazo[2,1-f]purine-2,4(3H,6H)-dione872842-83-6C17H19N5O2
- 9-(2,4-Dimethylphenyl)-1-methyl-6,7,8,9-tetrahydropyrimido[2,1-f]purine-2,4(1H,3H)-dione922453-73-4C17H19N5O2
- 8-(2,3-Dimethylphenyl)-1,3-dimethyl-7,8-dihydro-1H-imidazo[2,1-f]purine-2,4(3H,6H)-dione919032-39-6C17H19N5O2
- 8-Methyl-2-(morpholin-4-yl)-4-phenyl-1,4-dihydro-6H-pyrimido[1,2-a][1,3,5]triazin-6-one908496-37-7C17H19N5O2
- 2-Amino-1-methyl-N-[(oxolan-2-yl)methyl]-1H-pyrrolo[2,3-b]quinoxaline-3-carboxamide881474-16-4C17H19N5O2
- 8-(3,5-Dimethylphenyl)-1,3-dimethyl-7,8-dihydro-1H-imidazo[2,1-f]purine-2,4(3H,6H)-dione872843-13-5C17H19N5O2
- N-Butyl-6-imino-7-methyl-2-oxo-1,7,9-triazatricyclo[8.4.0.0^{3,8}]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide847367-54-8C17H19N5O2
- 6-Imino-2-oxo-7-pentyl-1,7,9-triazatricyclo[8.4.0.0^{3,8}]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide663219-02-1C17H19N5O2
- 6-(2,5-Dimethylphenyl)-2,4-dimethyl-7,8-dihydropurino[7,8-a]imidazole-1,3-dione915927-56-9C17H19N5O2
- {3-Ethoxy-4-[(1-phenyl-1H-tetrazol-5-yl)oxy]benzyl}methylamine931990-80-6C17H19N5O2
- 2(3H)-Benzoxazolone, 6-(2-(4-(2-pyrimidinyl)-1-piperazinyl)ethyl)-92584-68-4C17H19N5O2
- 1,3-Dimethyl-9-(4-methylphenyl)-7,8-dihydro-6H-purino[7,8-a]pyrimidine-2,4-dione844647-58-1C17H19N5O2
- N-[2-(Benzyloxy)-3-ethoxybenzyl]-1H-tetrazol-5-amine894859-60-0C17H19N5O2
- 2-Ethyl-4-methyl-6-(2-methylphenyl)-7,8-dihydropurino[7,8-a]imidazole-1,3-dione893962-43-1C17H19N5O2
- 6-(2,4-Dimethylphenyl)-2,4-dimethyl-7,8-dihydropurino[7,8-a]imidazole-1,3-dione919013-27-7C17H19N5O2
- N-{3-Methoxy-4-[(1-phenyl-1H-tetrazol-5-yl)oxy]benzyl}ethanamine932260-11-2C17H19N5O2
- N,N-Diethyl-2-(4-oxo-2-phenylpyrazolo[1,5-d][1,2,4]triazin-5(4H)-yl)acetamide1219841-81-2C17H19N5O2
- 1-Methyl-5-(2-oxo-2-piperidinoethyl)[1,2,4]triazolo[4,3-a]quinoxalin-4(5H)-one1358636-95-9C17H19N5O2
- 1-(1-([1,2,4]Triazolo[1,5-a]pyridin-6-yl)-1-hydroxypropan-2-yl)-3-(m-tolyl)urea1043908-01-5C17H19N5O2
- N-((1-Nicotinoylpiperidin-4-yl)methyl)pyrazine-2-carboxamide1396800-93-3C17H19N5O2
- (4-(1H-1,2,3-Triazol-1-yl)piperidin-1-yl)(6-methoxy-1H-indol-2-yl)methanone1798489-92-5C17H19N5O2
- 3-(4-(7H-Pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl)-3-cyclopentylpropanoic acid3016399-21-3C17H19N5O2
- 6-Imino-7-methyl-N-(2-methylpropyl)-2-oxo-1,7,9-triazatricyclo[8.4.0.0^{3,8}]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide844664-06-8C17H19N5O2
- 2-(5,7-Dimethyl-[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-N-(4-ethoxyphenyl)acetamide879057-16-6C17H19N5O2
- 3-Methyl-7-[(4-methylphenyl)methyl]-8-(prop-2-enylamino)purine-2,6-dione876893-27-5C17H19N5O2
- N-[3-Methoxy-4-(2-phenylethoxy)benzyl]-2H-tetrazol-5-amine878714-72-8C17H19N5O2
- 5-Methyl-N-(5-methyl-1,2-oxazol-3-yl)-1-[4-(propan-2-yl)phenyl]-1H-1,2,3-triazole-4-carboxamide904815-47-0C17H19N5O2
Frequently asked questions
What is the molar mass of C17H19N5O2?
The molar mass of C17H19N5O2 is 325.37 g/mol, calculated from standard atomic weights for 17 carbon atoms, 19 hydrogen atoms, 5 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 325.1539 Da.
How many compounds have the formula C17H19N5O2?
CompoundList lists 270 compounds with the molecular formula C17H19N5O2, including Pixantrone, Piritrexim, 2-Imino-1-isopropyl-N,10-dimethyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-A:2,3-D]pyrimidine-3-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 C17H19N5O2?
C17H19N5O2 has a degree of unsaturation of 11. 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.