Molecular formula
C19H15N3O5
95 compounds have this formula on CompoundList.
- Molar mass
- 365.34g/mol
- Monoisotopic mass
- 365.1012Da
- Atoms
- 42
- Elements
- 4
- Rings plus double bonds
- 14
The formula C19H15N3O5 describes a molecule made of 19 carbon atoms, 15 hydrogen atoms, 3 nitrogen atoms and 5 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 × 1962.46%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 154.14%1.008 × 15 = 15.120 g/mol
- N Nitrogen × 311.50%14.007 × 3 = 42.021 g/mol
- O Oxygen × 521.90%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C19H15N3O5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 95 of 95 compounds
(3E,5E)-3,5-Bis(4-nitrobenzylidene)piperidin-4-one
CAS 919091-63-7C19H15N3O5
![2-[2-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-oxoethyl]-4-nitro-1H-isoindole-1,3(2H)-dione chemical structure, C19H15N3O5, CAS 364609-31-4](/s/QOMJNWILGQQFNM-UHFFFAOYSA-N.svg)
2-[2-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-oxoethyl]-4-nitro-1H-isoindole-1,3(2H)-dione
CAS 364609-31-4C19H15N3O5
![3-Hydroxy-2-[5-(2-methyl-4-nitrophenyl)furan-2-yl]-1,2-dihydroquinazolin-4-one chemical structure, C19H15N3O5, CAS 438228-06-9](/s/RGOSQAVXTWDXKA-UHFFFAOYSA-N.svg)
3-Hydroxy-2-[5-(2-methyl-4-nitrophenyl)furan-2-yl]-1,2-dihydroquinazolin-4-one
CAS 438228-06-9C19H15N3O5
![5-[(1,3-Benzodioxol-5-ylamino)methylene]-1-(2-methylphenyl)-2,4,6(1H,3H,5H)-pyrimidinetrione chemical structure, C19H15N3O5, CAS 5396-17-8](/s/BAQJGCPECGZWDV-UHFFFAOYSA-N.svg)
5-[(1,3-Benzodioxol-5-ylamino)methylene]-1-(2-methylphenyl)-2,4,6(1H,3H,5H)-pyrimidinetrione
CAS 5396-17-8C19H15N3O5
(R)-(-)-N-(1-(1-Naphthyl)ethyl)-3,5-dinitrobenzamide
CAS 85922-30-1C19H15N3O5
![(S)-(+)-N-[1-(1-Naphthyl)ethyl]-3,5-dinitrobenzamide chemical structure, C19H15N3O5, CAS 85922-31-2](/s/RUUPGHVIODHXRI-LBPRGKRZSA-N.svg)
(S)-(+)-N-[1-(1-Naphthyl)ethyl]-3,5-dinitrobenzamide
CAS 85922-31-2C19H15N3O5
![2-Methoxy-4-{(E)-[2-(pyridin-3-ylcarbonyl)hydrazinylidene]methyl}phenyl furan-2-carboxylate chemical structure, C19H15N3O5, CAS 329062-04-6](/s/HDVJJSVOZUJWOG-SRZZPIQSSA-N.svg)
2-Methoxy-4-{(E)-[2-(pyridin-3-ylcarbonyl)hydrazinylidene]methyl}phenyl furan-2-carboxylate
CAS 329062-04-6C19H15N3O5
![N-{3-[(2-Methylbenzoyl)amino]phenyl}-5-nitro-2-furamide chemical structure, C19H15N3O5, CAS 329199-00-0](/s/AKEUMMFCXLQBKP-UHFFFAOYSA-N.svg)
N-{3-[(2-Methylbenzoyl)amino]phenyl}-5-nitro-2-furamide
CAS 329199-00-0C19H15N3O5
4-(4-Methoxy-benzylidene)-5-methyl-2-(4-nitro-benzoyl)-2,4-dihydro-pyrazol-3-one
CAS 124814-25-1C19H15N3O5
![N-[4-[(2-Methyl-3-nitrobenzoyl)amino]phenyl]furan-2-carboxamide chemical structure, C19H15N3O5, CAS 432519-59-0](/s/AGGSQEKLWTWEHZ-UHFFFAOYSA-N.svg)
N-[4-[(2-Methyl-3-nitrobenzoyl)amino]phenyl]furan-2-carboxamide
CAS 432519-59-0C19H15N3O5
4-Hydroxy-N-{4-nitrophenyl}-2-oxo-1-prop-2-enyl-1,2-dihydroquinoline-3-carboxamide
CAS 331653-23-7C19H15N3O5
![2'-Amino-1-ethyl-6'-(hydroxymethyl)-2,8'-dioxo-1,2-dihydro-8'H-spiro[indole-3,4'-pyrano[3,2-b]pyran]-3'-carbonitrile chemical structure, C19H15N3O5, CAS 626228-61-3](/s/ZJEWRSOGMRXSKI-UHFFFAOYSA-N.svg)
2'-Amino-1-ethyl-6'-(hydroxymethyl)-2,8'-dioxo-1,2-dihydro-8'H-spiro[indole-3,4'-pyrano[3,2-b]pyran]-3'-carbonitrile
CAS 626228-61-3C19H15N3O5
![(2Z)-N-Acetyl-2-[(4-methylphenyl)imino]-6-nitro-2H-chromene-3-carboxamide chemical structure, C19H15N3O5, CAS 330158-27-5](/s/GRTLYYWRDNKPJP-UHFFFAOYSA-N.svg)
(2Z)-N-Acetyl-2-[(4-methylphenyl)imino]-6-nitro-2H-chromene-3-carboxamide
CAS 330158-27-5C19H15N3O5
![(2Z)-N-Acetyl-2-[(2-methylphenyl)imino]-6-nitro-2H-chromene-3-carboxamide chemical structure, C19H15N3O5, CAS 330158-41-3](/s/ZUJAVASBOPKQFB-UHFFFAOYSA-N.svg)
(2Z)-N-Acetyl-2-[(2-methylphenyl)imino]-6-nitro-2H-chromene-3-carboxamide
CAS 330158-41-3C19H15N3O5
N-(3-(Furan-2-yl)-1-(2-hydroxyethyl)-1H-pyrazol-5-yl)-4-oxo-4H-chromene-2-carboxamide
CAS 1219902-00-7C19H15N3O5
(5-(Furan-2-yl)isoxazol-3-yl)methyl 3-(4-oxoquinazolin-3(4H)-yl)propanoate
CAS 1208393-89-8C19H15N3O5
![6-(2-((9-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)oxy)acetyl)-2H-benzo[b][1,4]oxazin-3(4H)-one chemical structure, C19H15N3O5, CAS 1105213-44-2](/s/INROKOYBMPMDJG-UHFFFAOYSA-N.svg)
6-(2-((9-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-yl)oxy)acetyl)-2H-benzo[b][1,4]oxazin-3(4H)-one
CAS 1105213-44-2C19H15N3O5
![4-((3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)methyl)-7-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one chemical structure, C19H15N3O5, CAS 1105228-92-9](/s/FPZLCHRJRYAWDR-UHFFFAOYSA-N.svg)
4-((3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)methyl)-7-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one
CAS 1105228-92-9C19H15N3O5
![N-Phenyl-2-[4-[(2,4,6-trioxo-1,3-diazinan-5-ylidene)methyl]phenoxy]acetamide chemical structure, C19H15N3O5, CAS 6160-29-8](/s/SAQXREAMMIWALC-UHFFFAOYSA-N.svg)
N-Phenyl-2-[4-[(2,4,6-trioxo-1,3-diazinan-5-ylidene)methyl]phenoxy]acetamide
CAS 6160-29-8C19H15N3O5
4-Oxo-5-(2-oxo-2-(phenylamino)ethoxy)-N-(pyridin-4-yl)-4H-pyran-2-carboxamide
CAS 1105251-46-4C19H15N3O5
![2-(1,3-Dioxoisoindolin-2-yl)-N-(5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)acetamide chemical structure, C19H15N3O5, CAS 922027-34-7](/s/DGLGHGDIEGXLTR-UHFFFAOYSA-N.svg)
2-(1,3-Dioxoisoindolin-2-yl)-N-(5-oxo-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepin-7-yl)acetamide
CAS 922027-34-7C19H15N3O5
![1-[5-(1,3-Dihydro-1-oxo-5-isobenzofuranyl)-8-methoxy[1,2,4]triazolo[1,5-a]pyridin-2-yl]cyclopropanecarboxylic acid chemical structure, C19H15N3O5, CAS 1643380-42-0](/s/AXMIHGISHDNHPG-UHFFFAOYSA-N.svg)
1-[5-(1,3-Dihydro-1-oxo-5-isobenzofuranyl)-8-methoxy[1,2,4]triazolo[1,5-a]pyridin-2-yl]cyclopropanecarboxylic acid
CAS 1643380-42-0C19H15N3O5
![2-[2-(5-Methoxy-7-nitro-1H-indol-3-yl)ethyl]-1H-isoindole-1,3(2H)-dione chemical structure, C19H15N3O5, CAS 94830-04-3](/s/RUEQMJSFJFHIAN-UHFFFAOYSA-N.svg)
2-[2-(5-Methoxy-7-nitro-1H-indol-3-yl)ethyl]-1H-isoindole-1,3(2H)-dione
CAS 94830-04-3C19H15N3O5
(E)-Ethyl 4-(2-cyano-3-(3-nitrophenyl)acrylamido)benzoate
CAS 341927-83-1C19H15N3O5
- N-[4-[(3-Methylbenzoyl)amino]phenyl]-5-nitrofuran-2-carboxamide352341-77-6C19H15N3O5
- 2-[2-(7-Methoxy-4-nitro-1H-indol-3-yl)ethyl]isoindole-1,3-dione94830-03-2C19H15N3O5
- 7-Hydroxy-N-(3-nitrophenyl)-5-oxo-2,3-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline-6-carboxamide303987-19-1C19H15N3O5
- 3,5-Bis[(4-nitrophenyl)methylidene]piperidin-4-one330450-41-4C19H15N3O5
- 2-[2-(7-Methoxy-5-nitro-1H-indol-3-yl)ethyl]-1H-isoindole-1,3(2H)-dione94830-05-4C19H15N3O5
- 3-Hydroxy-4-[(5-methylfuran-2-yl)carbonyl]-1-(5-methyl-1,2-oxazol-3-yl)-5-(pyridin-3-yl)-1,5-dihydro-2H-pyrrol-2-one575470-93-8C19H15N3O5
- 2-(2-(5-(Benzo[d][1,3]dioxol-5-yl)isoxazol-3-yl)acetamido)benzamide1105244-96-9C19H15N3O5
- 2-(4-Nitrophenyl)-2-oxoethyl 2,3-dimethylquinoxaline-6-carboxylate524043-54-7C19H15N3O5
- Ethyl 4-((2-hydroxy-1-naphthyl)azo)-3-nitrobenzoate85136-50-1C19H15N3O5
- 2-Hydroxy-N'-{(E)-[5-(3-nitrophenyl)furan-2-yl]methylidene}-2-phenylacetohydrazide418773-17-8C19H15N3O5
- 3-Oxo-3-(3-phenyl-5-isoxazolyl)propanal O-(4-nitrobenzyl)oxime338393-49-0C19H15N3O5
- 1-(2H-1,3-Benzodioxol-5-yl)-3-{[(2H-1,3-benzodioxol-5-yl)methyl]amino}-1,2-dihydropyrazin-2-one941935-01-9C19H15N3O5
- N-{4-[(2-Methyl-7-oxo-7H-isoxazolo[2,3-a]pyrimidin-5-yl)methoxy]phenyl}-2-furamide1206123-38-7C19H15N3O5
- 1-[2-(1,3-Benzodioxol-5-yl)-2-oxoethyl]-3-(3-cyclopropyl-1,2,4-oxadiazol-5-yl)pyridin-2(1H)-one1396759-53-7C19H15N3O5
- 2-((3-(2,3-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)isoindoline-1,3-dione1809475-14-6C19H15N3O5
- 3-({(Z)-[1-(4-Methylphenyl)-2,4,6-trioxotetrahydropyrimidin-5(2H)-ylidene]methyl}amino)benzoic acid354998-08-6C19H15N3O5
- N-(5-(5,6-Dihydro-1,4-dioxin-2-yl)-1,3,4-oxadiazol-2-yl)-4-phenoxybenzamide851095-01-7C19H15N3O5
- 3-(Cyclopropanecarboxamido)-N-(4-nitrophenyl)benzofuran-2-carboxamide887897-09-8C19H15N3O5
- 2-Benzamido-N-(benzo[d][1,3]dioxol-5-ylmethyl)oxazole-4-carboxamide1286711-16-7C19H15N3O5
- N-(4-(2-Carbamoylphenoxy)but-2-yn-1-yl)-5-(furan-2-yl)isoxazole-3-carboxamide1448073-33-3C19H15N3O5
- 4-({[2,4,6-Trioxo-1-benzyl-1,3-dihydropyrimidin-5-ylidene]methyl}amino)benzoic acid943418-45-9C19H15N3O5
- Methyl 4-[(2,4-dioxo-3-phenyl-1H-pyrimidine-5-carbonyl)amino]benzoate863595-43-1C19H15N3O5
- Benzyl N-[4-(5-nitro-6-oxo-1H-pyridin-3-yl)phenyl]carbamate64606-03-7C19H15N3O5
- N-(5-(5,6-Dihydro-1,4-dioxin-2-yl)-1,3,4-oxadiazol-2-yl)-2-phenoxybenzamide887877-85-2C19H15N3O5
- (E)-2-Cyano-3-(2-methylphenyl)-N-(6-nitro-2,3-dihydro-1,4-benzodioxin-7-yl)prop-2-enamide850216-13-6C19H15N3O5
- N-(1,3-Benzodioxol-5-yl)-4-methoxy-6-oxo-1-phenylpyridazine-3-carboxamide941948-38-5C19H15N3O5
- 4-((3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)methyl)-2-methyl-2H-benzo[b][1,4]oxazin-3(4H)-one1105204-76-9C19H15N3O5
- (E)-N'-(4-Hydroxy-3-nitrobenzylidene)-3-methoxy-2-naphthohydrazide329788-38-7C19H15N3O5
- 4-Acetyl-N-[5-(2,3-dihydro-1,4-benzodioxin-6-yl)-1,3,4-oxadiazol-2-yl]benzamide851094-53-6C19H15N3O5
- 3-Acetamido-6-nitro-4-phenylquinolin-2-yl acetate919296-60-9C19H15N3O5
- 2,4-Dinitro-N-[3-(phenylmethoxy)phenyl]benzenamine854870-00-1C19H15N3O5
- 1-(Benzyloxy)-N-(2-nitrophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide852364-50-2C19H15N3O5
- 1-(Benzyloxy)-N-(3-nitrophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide852364-53-5C19H15N3O5
- 1-(Benzyloxy)-N-(4-nitrophenyl)-2-oxo-1,2-dihydropyridine-3-carboxamide852364-56-8C19H15N3O5
- N-(3-Methoxyphenyl)-2-oxo-2-(2-((4-oxo-4H-chromen-3-yl)methylene)hydrazinyl)acetamide765904-46-9C19H15N3O5
- N-(4-Methoxyphenyl)-2-oxo-2-(2-((4-oxo-4H-chromen-3-yl)methylene)hydrazinyl)acetamide880073-69-8C19H15N3O5
- 2-Cyano-N-(4-ethylphenyl)-3-(6-nitro-1,3-dioxaindan-5-yl)prop-2-enamide891623-46-4C19H15N3O5
- 2-Cyano-N-(2,3-dimethylphenyl)-3-(6-nitro-1,3-dioxaindan-5-yl)prop-2-enamide891623-70-4C19H15N3O5
- (Z)-2-Cyano-N-(2,4-dimethylphenyl)-3-(6-nitro-1,3-benzodioxol-5-yl)prop-2-enamide868358-22-9C19H15N3O5
- 1H-Pyrazole-3,4-dicarboxylic acid, 1-(4-acetamidophenyl)-5-phenyl-96734-48-4C19H15N3O5
- 2-Cyano-N-(2,3-dimethylphenyl)-3-(6-nitro-2H-1,3-benzodioxol-5-yl)prop-2-enamideC19H15N3O5
- 2-Cyano-N-(4-ethylphenyl)-3-(6-nitro-2H-1,3-benzodioxol-5-yl)prop-2-enamideC19H15N3O5
- N-(4-Methoxyphenyl)-1-{N'-[(E)-(4-oxo-4H-chromen-3-yl)methylidene]hydrazinecarbonyl}formamideC19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-(3-methyl-2-oxo-2,3-dihydro-1H-1,3-benzodiazol-1-yl)propanoate2248285-88-1C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-ethyl-3-oxo-1,2,3,4-tetrahydroquinoxaline-6-carboxylate2248399-24-6C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-(5-cyano-2,4-dimethyl-6-oxo-1,6-dihydropyridin-3-yl)propanoate2248350-45-8C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-oxo-3-(propan-2-yl)-2,3-dihydro-1H-1,3-benzodiazole-5-carboxylate2248351-18-8C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(3-ethyl-2-oxo-2,3-dihydro-1H-1,3-benzodiazol-1-yl)acetate2248351-91-7C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-methyl-6-(propan-2-yl)-[1,2]oxazolo[5,4-b]pyridine-4-carboxylate2248303-26-4C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-(2-oxo-1,3-diazinan-1-yl)benzoate2248338-49-8C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-methyl-4-oxo-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine-7-carboxylate2248305-12-4C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1,2-dimethyl-3-oxo-1,2,3,4-tetrahydroquinoxaline-6-carboxylate2248258-67-3C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-(pyrrolidine-1-carbonyl)pyridine-2-carboxylate2248281-70-9C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-methyl-3-(2-oxoimidazolidin-1-yl)benzoate2248393-43-1C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-[(cyclopropylcarbamoyl)amino]benzoate2248297-49-4C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl (2S)-1-(pyridine-2-carbonyl)pyrrolidine-2-carboxylate2248184-51-0C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-tert-butyl-[1,2]oxazolo[5,4-b]pyridine-5-carboxylate2248336-13-0C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-methyl-4-(2-oxoimidazolidin-1-yl)benzoate2248312-55-0C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-methyl-3-(propan-2-yl)-[1,2]oxazolo[5,4-b]pyridine-4-carboxylate2248298-18-0C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2,5-dimethyl-1-(5-methyl-1,2-oxazol-3-yl)-1H-pyrrole-3-carboxylate2248376-91-0C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 4-(2-oxo-2,3-dihydro-1H-1,3-benzodiazol-5-yl)butanoate2248388-90-9C19H15N3O5
- 5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylic acid2385047-06-1C19H15N3O5
- 5-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,3,4-oxadiazole-2-carboxylic acid2580238-82-8C19H15N3O5
- 5-[({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)methyl]-1,2,4-oxadiazole-3-carboxylic acid2580252-84-0C19H15N3O5
- Benzyl N-[3-nitro-5-(pyridin-3-yloxy)phenyl]carbamate2680669-94-5C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-oxo-1-[(pyridin-2-yl)methyl]pyrrolidine-3-carboxylate2248400-62-4C19H15N3O5
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-oxo-1-[(pyridin-3-yl)methyl]pyrrolidine-3-carboxylate2248312-86-7C19H15N3O5
- (9H-Fluoren-9-yl)methyl N-(5-hydroxy-2,6-dioxo-1,2,3,6-tetrahydropyrimidin-4-yl)carbamate2763938-70-9C19H15N3O5
- 2-[5-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-1,2,4-oxadiazol-3-yl]acetic acid2770487-43-7C19H15N3O5
- (E)-2-Cyano-N-(4-ethylphenyl)-3-(6-nitro-1,3-benzodioxol-5-yl)prop-2-enamideC19H15N3O5
- (E)-2-Cyano-N-(2,3-dimethylphenyl)-3-(6-nitro-1,3-benzodioxol-5-yl)prop-2-enamideC19H15N3O5
Frequently asked questions
What is the molar mass of C19H15N3O5?
The molar mass of C19H15N3O5 is 365.34 g/mol, calculated from standard atomic weights for 19 carbon atoms, 15 hydrogen atoms, 3 nitrogen atoms and 5 oxygen atoms. The monoisotopic mass is 365.1012 Da.
How many compounds have the formula C19H15N3O5?
CompoundList lists 95 compounds with the molecular formula C19H15N3O5, including (3E,5E)-3,5-Bis(4-nitrobenzylidene)piperidin-4-one, 2-[2-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-oxoethyl]-4-nitro-1H-isoindole-1,3(2H)-dione, 3-Hydroxy-2-[5-(2-methyl-4-nitrophenyl)furan-2-yl]-1,2-dihydroquinazolin-4-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 C19H15N3O5?
C19H15N3O5 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.