Molecular formula
C19H17N5O
148 compounds have this formula on CompoundList.
- Molar mass
- 331.38g/mol
- Monoisotopic mass
- 331.1433Da
- Atoms
- 42
- Elements
- 4
- Rings plus double bonds
- 14
The formula C19H17N5O describes a molecule made of 19 carbon atoms, 17 hydrogen atoms, 5 nitrogen atoms and 1 oxygen atom. 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 × 1968.87%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 175.17%1.008 × 17 = 17.136 g/mol
- N Nitrogen × 521.13%14.007 × 5 = 70.035 g/mol
- O Oxygen × 14.83%15.999 × 1 = 15.999 g/mol
Look up another formula
Compounds with the formula C19H17N5O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 148 compounds
![(E)-4-(((1H-Benzo[d]imidazol-2-yl)methylene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one chemical structure, C19H17N5O, CAS 324010-37-9](/s/DGPISMKSVMXLQS-UHFFFAOYSA-N.svg)
(E)-4-(((1H-Benzo[d]imidazol-2-yl)methylene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one
CAS 324010-37-9C19H17N5O
![N-(4-Ethoxyphenyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine chemical structure, C19H17N5O, CAS 393785-59-6](/s/PZEBHXQTAHIDHI-UHFFFAOYSA-N.svg)
N-(4-Ethoxyphenyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine
CAS 393785-59-6C19H17N5O
![N-(2-Methoxybenzyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine chemical structure, C19H17N5O, CAS 393820-16-1](/s/SWCQVRSQXNFTRK-UHFFFAOYSA-N.svg)
N-(2-Methoxybenzyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine
CAS 393820-16-1C19H17N5O
![N-(2-Ethoxyphenyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine chemical structure, C19H17N5O, CAS 393785-54-1](/s/XIRNXCDCPDXGRH-UHFFFAOYSA-N.svg)
N-(2-Ethoxyphenyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine
CAS 393785-54-1C19H17N5O
![6-(3-Methyl-benzofuran-2-yl)-N-o-tolyl-[1,3,5]triazine-2,4-diamine chemical structure, C19H17N5O, CAS 810686-85-2](/s/WLSZNQHAOUDXGQ-UHFFFAOYSA-N.svg)
6-(3-Methyl-benzofuran-2-yl)-N-o-tolyl-[1,3,5]triazine-2,4-diamine
CAS 810686-85-2C19H17N5O
![1-Benzyl-N-(4-methoxyphenyl)pyrazolo[3,4-d]pyrimidin-4-amine chemical structure, C19H17N5O, CAS 333324-50-8](/s/MMRNSEFJHIVRBF-UHFFFAOYSA-N.svg)
1-Benzyl-N-(4-methoxyphenyl)pyrazolo[3,4-d]pyrimidin-4-amine
CAS 333324-50-8C19H17N5O
Bezuclastinib
CAS 1616385-51-3C19H17N5O
6-(3-Methyl-1-benzofuran-2-yl)-N-(4-methylphenyl)-1,3,5-triazine-2,4-diamine
CAS 713507-42-7C19H17N5O
![6-(3-Methyl-benzofuran-2-yl)-N-m-tolyl-[1,3,5]triazine-2,4-diamine chemical structure, C19H17N5O, CAS 810628-30-9](/s/HFRAQUQLSKDGPJ-UHFFFAOYSA-N.svg)
6-(3-Methyl-benzofuran-2-yl)-N-m-tolyl-[1,3,5]triazine-2,4-diamine
CAS 810628-30-9C19H17N5O
![1-(3,4-Dimethylphenyl)-5-(pyridin-2-ylmethyl)pyrazolo[3,4-d]pyrimidin-4-one chemical structure, C19H17N5O, CAS 841211-81-2](/s/KAHVRZQSGJCABN-UHFFFAOYSA-N.svg)
1-(3,4-Dimethylphenyl)-5-(pyridin-2-ylmethyl)pyrazolo[3,4-d]pyrimidin-4-one
CAS 841211-81-2C19H17N5O
![(4E)-2-(1H-Benzimidazol-2-yl)-5-methyl-4-{[(4-methylphenyl)amino]methylidene}-2,4-dihydro-3H-pyrazol-3-one chemical structure, C19H17N5O, CAS 516455-60-0](/s/ROYLBVSOEBTEIM-UHFFFAOYSA-N.svg)
(4E)-2-(1H-Benzimidazol-2-yl)-5-methyl-4-{[(4-methylphenyl)amino]methylidene}-2,4-dihydro-3H-pyrazol-3-one
CAS 516455-60-0C19H17N5O
![N-(1-Ethyl-7-methylpyrazolo[3,4-b]quinolin-3-yl)pyridine-4-carboxamide chemical structure, C19H17N5O, CAS 714239-93-7](/s/FQMXEKJKLGSGNK-UHFFFAOYSA-N.svg)
N-(1-Ethyl-7-methylpyrazolo[3,4-b]quinolin-3-yl)pyridine-4-carboxamide
CAS 714239-93-7C19H17N5O
![6-(4-Methoxyphenyl)-5-methyl-3-(2-pyridinyl)pyrazolo[1,5-a]pyrimidin-7-ylamine chemical structure, C19H17N5O, CAS 685109-46-0](/s/ILTUMSBUJWZLMR-UHFFFAOYSA-N.svg)
6-(4-Methoxyphenyl)-5-methyl-3-(2-pyridinyl)pyrazolo[1,5-a]pyrimidin-7-ylamine
CAS 685109-46-0C19H17N5O
![6-(3-Methylbenzyl)-3-(p-tolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-one chemical structure, C19H17N5O, CAS 863019-33-4](/s/UCQNSZUHSGVQEX-UHFFFAOYSA-N.svg)
6-(3-Methylbenzyl)-3-(p-tolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-one
CAS 863019-33-4C19H17N5O
![6-(2-Methylbenzyl)-3-(p-tolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-one chemical structure, C19H17N5O, CAS 863019-30-1](/s/FLBSUNNXNXZCMB-UHFFFAOYSA-N.svg)
6-(2-Methylbenzyl)-3-(p-tolyl)-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-one
CAS 863019-30-1C19H17N5O
N'-(1H-Indol-3-ylmethylene)-2-(2-methyl-1H-benzimidazol-1-yl)acetohydrazide
CAS 303094-97-5C19H17N5O
![1-Benzyl-N-(2-methoxyphenyl)pyrazolo[3,4-d]pyrimidin-4-amine chemical structure, C19H17N5O, CAS 333324-53-1](/s/VZAUMRGQFRYSJY-UHFFFAOYSA-N.svg)
1-Benzyl-N-(2-methoxyphenyl)pyrazolo[3,4-d]pyrimidin-4-amine
CAS 333324-53-1C19H17N5O
![N-(4-(1H-Benzo[d]imidazol-2-yl)phenyl)-1,5-dimethyl-1H-pyrazole-3-carboxamide chemical structure, C19H17N5O, CAS 1014027-98-5](/s/ZZXVZRZSUWFLIN-UHFFFAOYSA-N.svg)
N-(4-(1H-Benzo[d]imidazol-2-yl)phenyl)-1,5-dimethyl-1H-pyrazole-3-carboxamide
CAS 1014027-98-5C19H17N5O
![N-[(6-Methyl-[1,2,4]triazolo[3,4-a]phthalazin-3-yl)methyl]-N-phenylacetamide chemical structure, C19H17N5O, CAS 825656-53-9](/s/ZGKAHOCYKSGJAZ-UHFFFAOYSA-N.svg)
N-[(6-Methyl-[1,2,4]triazolo[3,4-a]phthalazin-3-yl)methyl]-N-phenylacetamide
CAS 825656-53-9C19H17N5O
Quinazopyrine
CAS 100330-91-4C19H17N5O
![2-(4-Methoxyphenethyl)-7-(4-pyridyl)[1,2,4]triazolo[1,5-a]pyrimidine chemical structure, C19H17N5O, CAS 1435983-42-8](/s/QWGMYPQWRAUWNW-UHFFFAOYSA-N.svg)
2-(4-Methoxyphenethyl)-7-(4-pyridyl)[1,2,4]triazolo[1,5-a]pyrimidine
CAS 1435983-42-8C19H17N5O
![2-Amino-N-benzyl-1-methyl-1H-pyrrolo[2,3-b]quinoxaline-3-carboxamide chemical structure, C19H17N5O, CAS 881474-05-1](/s/XSJCFNJGQIMBAA-UHFFFAOYSA-N.svg)
2-Amino-N-benzyl-1-methyl-1H-pyrrolo[2,3-b]quinoxaline-3-carboxamide
CAS 881474-05-1C19H17N5O
![4-[4-(4,6-Dimethylpyrimidin-5-yl)-3-methylphenoxy]-1H-pyrazolo[4,3-c]pyridine chemical structure, C19H17N5O, CAS 1609258-91-4](/s/IDIUJOHYYBNCPC-UHFFFAOYSA-N.svg)
4-[4-(4,6-Dimethylpyrimidin-5-yl)-3-methylphenoxy]-1H-pyrazolo[4,3-c]pyridine
CAS 1609258-91-4C19H17N5O
![2-[(4,6,7-Trimethylquinazolin-2-yl)amino]quinazolin-4-ol chemical structure, C19H17N5O, CAS 362000-15-5](/s/LASKMRBJTDVJIH-UHFFFAOYSA-N.svg)
2-[(4,6,7-Trimethylquinazolin-2-yl)amino]quinazolin-4-ol
CAS 362000-15-5C19H17N5O
- N-(4-Benzyloxyphenyl)-5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-amine626223-30-1C19H17N5O
- 1,2,4-Triazolo(3,4-a)phthalazine, 6-(4-morpholinyl)-3-phenyl-87539-85-3C19H17N5O
- 2-(4-Methoxyphenethyl)-7-(3-pyridyl)[1,2,4]triazolo[1,5-a]pyrimidine1436005-95-6C19H17N5O
- N-[4-(6-Methyl-[1,2,4]triazolo[3,4-a]phthalazin-3-yl)phenyl]propanamide701946-16-9C19H17N5O
- 2-(4-Methoxyphenethyl)-7-(2-pyridyl)[1,2,4]triazolo[1,5-a]pyrimidine1435983-60-0C19H17N5O
- 3-(1-Benzyl-5-methyl-1H-1,2,3-triazol-4-yl)-5-(2-methylphenyl)-1,2,4-oxadiazole1251630-76-8C19H17N5O
- 2-(5-Methyl-1-(p-tolyl)-1H-1,2,3-triazol-4-yl)-5-(o-tolyl)-1,3,4-oxadiazole951899-99-3C19H17N5O
- 1-(3-Methoxyphenyl)-6-(methylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-ol1044140-09-1C19H17N5O
- Phenol, 4-(6-(1-pyrrolidinyl)-1,2,4-triazolo(3,4-a)phthalazin-3-yl)-87540-29-2C19H17N5O
- N-(2-(1H-Benzo[d]imidazol-2-yl)phenyl)-1-ethyl-1H-pyrazole-5-carboxamide1171923-65-1C19H17N5O
- 2-[(4,6,8-Trimethylquinazolin-2-yl)amino]quinazolin-4-ol362000-20-2C19H17N5O
- 1,2-Dimethyl-4-(6-methyl-pyridin-2-yl)-5-quinoxalin-6-yl-1,2-dihydro-pyrazol-3-one937278-87-0C19H17N5O
- 4-(3-Aminophenyl)-1,2-dihydro-1,2-dimethyl-5-(quinoxalin-7-yl)pyrazol-3-one937278-88-1C19H17N5O
- 4-(2-Aminophenyl)-1,2-dihydro-1,2-dimethyl-5-(quinoxalin-7-yl)pyrazol-3-one937278-98-3C19H17N5O
- N-(3-Methoxyphenyl)-1-(4-methylphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine383902-86-1C19H17N5O
- 2-Anilino-8-methyl-4-phenyl-1,4-dihydro-6H-pyrimido[1,2-a][1,3,5]triazin-6-one886160-42-5C19H17N5O
- (4-Methoxyphenyl)[1-(4-methylphenyl)pyrazolo[4,5-e]pyrimidin-4-yl]amine385393-11-3C19H17N5O
- N-(4-Methoxybenzyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine393820-11-6C19H17N5O
- 6-Amino-3-propyl-4-quinolin-4-yl-2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile489403-88-5C19H17N5O
- 1-(4-Methoxyphenyl)-N-(o-tolyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine393784-88-8C19H17N5O
- 1-(4-Methoxyphenyl)-N-(4-methylphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine393784-97-9C19H17N5O
- 6-(1-Benzofuran-2-yl)-N-(2,4-dimethylphenyl)-1,3,5-triazine-2,4-diamine709004-49-9C19H17N5O
- 6-(1-Benzofuran-2-yl)-N-(4-ethylphenyl)-1,3,5-triazine-2,4-diamine810686-88-5C19H17N5O
- 6-(1-Benzofuran-2-yl)-N-(2,3-dimethylphenyl)-1,3,5-triazine-2,4-diamine774560-10-0C19H17N5O
- 6-(1-Benzofuran-2-yl)-N-(3,4-dimethylphenyl)-1,3,5-triazine-2,4-diamine774562-90-2C19H17N5O
- N-(2-Cyanophenyl)-1-(3,4-dimethylphenyl)-5-methyl-1H-1,2,3-triazole-4-carboxamide904815-58-3C19H17N5O
- N-Benzyl-1-(4-methoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine393784-34-4C19H17N5O
- 2-(5-Methyl-1-(m-tolyl)-1H-1,2,3-triazol-4-yl)-5-(o-tolyl)-1,3,4-oxadiazole951902-71-9C19H17N5O
- 6-(4-Methoxyphenyl)-5-methyl-2-phenyl[1,2,4]triazolo[1,5-a]pyrimidin-7-amine945333-91-5C19H17N5O
- N-((2-Methoxyphenyl)methyl)-3-phenyl-1,2,4-triazolo(4,3-b)pyridazin-6-amine289662-13-1C19H17N5O
- N-(3-(1H-Benzo[d]imidazol-2-yl)phenyl)-1,5-dimethyl-1H-pyrazole-3-carboxamide1014045-57-8C19H17N5O
- 2-(5-Methyl-1-(o-tolyl)-1H-1,2,3-triazol-4-yl)-5-(o-tolyl)-1,3,4-oxadiazole951902-95-7C19H17N5O
- 4-((1H-Imidazol-1-yl)methyl)-N-(pyrazolo[1,5-a]pyridin-3-ylmethyl)benzamide1396874-77-3C19H17N5O
- N-(2-Cyanophenyl)-1-(4-ethylphenyl)-5-methyl-1H-1,2,3-triazole-4-carboxamide904812-87-9C19H17N5O
- 2-Phenyl-5-morpholino[1,2,4]triazolo[1,5-c]quinazoline153488-39-2C19H17N5O
- N-[3-(1H-1,3-Benzodiazol-2-yl)phenyl]-1,3-dimethyl-1H-pyrazole-5-carboxamide1014045-67-0C19H17N5O
- 2-[5-Methyl-1-(4-methylphenyl)-1H-1,2,3-triazol-4-yl]-5-(4-methylphenyl)-1,3,4-oxadiazole950256-21-0C19H17N5O
- 2-[1-(3,5-Dimethylphenyl)-5-methyl-1H-1,2,3-triazol-4-yl]-5-phenyl-1,3,4-oxadiazole950242-32-7C19H17N5O
- 3-(Prop-2-en-1-yl)-2-[3-(pyridin-3-yl)-1H-pyrazol-4-yl]-1,2,3,4-tetrahydroquinazolin-4-one1223638-11-6C19H17N5O
- 3-Cyano-N-(2-(5-methyl-3-(pyridin-4-yl)-1H-pyrazol-1-yl)ethyl)benzamide2034476-48-5C19H17N5O
- N-[3-(2-Phenylethyl)-1H-1,2,4-triazol-5-yl]-1H-indole-6-carboxamide1809486-18-7C19H17N5O
- (8S,8aR)-6-Amino-8-(3-hydroxyphenyl)-2-methyl-1,3,8,8a-tetrahydroisoquinoline-5,7,7-tricarbonitrile303959-37-7C19H17N5O
- 8-{[1-(2,4-Dimethylphenyl)-1H-tetrazol-5-yl]methoxy}quinoline912900-19-7C19H17N5O
- 1-(2,4-Dimethylphenyl)-5-(pyridin-2-ylmethyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one897616-38-5C19H17N5O
- 2-[1-(2,4-Dimethylphenyl)-5-methyl-1H-1,2,3-triazol-4-yl]-5-phenyl-1,3,4-oxadiazole950242-61-2C19H17N5O
- 2-[1-(4-Ethylphenyl)-5-methyl-1H-1,2,3-triazol-4-yl]-5-phenyl-1,3,4-oxadiazole950252-33-2C19H17N5O
- 7-[(4-Acetylphenyl)methyl]-7H-pyrrolo[3,2-f]-quinazoline-1,3-diamine65795-96-2C19H17N5O
- N-(2-(1H-Benzo[d]imidazol-2-yl)phenyl)-1,4-dimethyl-1H-pyrazole-5-carboxamide1207049-68-0C19H17N5O
- 5-[1-(3,5-Dimethylphenyl)-5-methyl-1H-1,2,3-triazol-4-yl]-3-phenyl-1,2,4-oxadiazole1185012-57-0C19H17N5O
- 5-((4-Ethyl-6-(2-methoxypyridin-4-yl)pyrimidin-5-yl)ethynyl)pyridin-2-amine1321606-63-6C19H17N5O
- 5-((4-Ethyl-6-(6-methoxypyridin-3-yl)pyrimidin-5-yl)ethynyl)pyridin-2-amine1321606-60-3C19H17N5O
- 2-(2,4-Dimethylpyrimido[1,2-b]indazol-3-yl)-N-(3-pyridyl)acetamide1401533-44-5C19H17N5O
- 11-(1H-Indole-2-carbonyl)-4-methyl-2,3,7,11-tetraazatricyclo[7.4.0.0^{2,6}]trideca-1(9),3,5,7-tetraene1797190-04-5C19H17N5O
- N-{[5-(1-Methyl-1H-pyrazol-4-yl)pyridin-3-yl]methyl}-1H-indole-6-carboxamide2034461-37-3C19H17N5O
- 7-([1,1'-Biphenyl]-4-yl)-5-methyl-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide941943-47-1C19H17N5O
- N-(1H-Benzo[d]imidazol-2-yl)-3,5-dimethyl-1-phenyl-1H-pyrazole-4-carboxamide956910-39-7C19H17N5O
- 6-(2,5-Dimethylbenzyl)-3-phenyl-3H-[1,2,3]triazolo[4,5-d]pyrimidin-7(6H)-one892479-19-5C19H17N5O
- 3-(3-Methylphenyl)-6-[(2-methylphenyl)methyl]triazolo[4,5-d]pyrimidin-7-one893936-88-4C19H17N5O
- 3-(3-Methylphenyl)-6-[(3-methylphenyl)methyl]triazolo[4,5-d]pyrimidin-7-one893937-04-7C19H17N5O
- 3-(3-Methylphenyl)-6-[(4-methylphenyl)methyl]triazolo[4,5-d]pyrimidin-7-one893937-19-4C19H17N5O
- 6-Benzyl-3-(3,4-dimethylphenyl)triazolo[4,5-d]pyrimidin-7-one893918-45-1C19H17N5O
- 6-Benzyl-3-(3,5-dimethylphenyl)triazolo[4,5-d]pyrimidin-7-one893923-66-5C19H17N5O
- N1-[2-(4-amino-1H-imidazo[4,5-c]quinolin-1-yl)ethyl]benzamide313347-51-2C19H17N5O
- 9H-Purin-2-amine, 6-(phenylmethoxy)-9-(phenylmethyl)-156422-39-8C19H17N5O
- N-(4-(1H-Benzo[d]imidazol-2-yl)phenyl)-1,3-dimethyl-1H-pyrazole-5-carboxamide1013797-56-2C19H17N5O
- 1-Methyl-N-[4-(1H-1,2,4-triazol-1-ylmethyl)phenyl]-1H-indole-3-carboxamide1374538-37-0C19H17N5O
- 6-(4-Aminophenyl)-N-(2-methoxyphenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-amine1309593-66-5C19H17N5O
- 1-Methyl-N-[4-(1H-1,2,4-triazol-1-ylmethyl)phenyl]-1H-indole-6-carboxamide1374537-16-2C19H17N5O
- 1-Methyl-N-[4-(1H-1,2,4-triazol-1-ylmethyl)phenyl]-1H-indole-2-carboxamide1351698-45-7C19H17N5O
- 7-Amino-5-(morpholin-4-yl)-2-phenyl-1,6-naphthyridine-8-carbonitrile922522-98-3C19H17N5O
- 5-Amino-7-(morpholin-4-yl)-2-phenyl-1,6-naphthyridine-8-carbonitrile922522-97-2C19H17N5O
- (1H-Indol-6-yl)(2-methyl-8,9-dihydropyrazolo[1,5-a]pyrido[3,4-e]pyrimidin-7(6H)-yl)methanone1797335-93-3C19H17N5O
- N-(2-(8-Methylimidazo[1,2-a]pyridin-2-yl)phenyl)-2-(1H-pyrazol-1-yl)acetamide1795303-56-8C19H17N5O
- 3-(5-Cyclopropyl-1,3,4-oxadiazol-2-yl)-5-(1-methyl-1H-indol-5-yl)-2-pyridinamine1617499-09-8C19H17N5O
- N-(3-([1,2,4]Triazolo[1,5-a]pyrimidin-6-yl)propyl)-1-naphthamide2034558-24-0C19H17N5O
- 12-(3-Phenyl-1H-pyrazole-5-carbonyl)-4,6,12-triazatricyclo[7.2.1.0^{2,7}]dodeca-2(7),3,5-triene2401373-24-6C19H17N5O
Frequently asked questions
What is the molar mass of C19H17N5O?
The molar mass of C19H17N5O is 331.38 g/mol, calculated from standard atomic weights for 19 carbon atoms, 17 hydrogen atoms, 5 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 331.1433 Da.
How many compounds have the formula C19H17N5O?
CompoundList lists 148 compounds with the molecular formula C19H17N5O, including (E)-4-(((1H-Benzo[d]imidazol-2-yl)methylene)amino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one, N-(4-Ethoxyphenyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine, N-(2-Methoxybenzyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine. 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 C19H17N5O?
C19H17N5O 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.