Molecular formula
C19H23N3O3S
209 compounds have this formula on CompoundList.
- Molar mass
- 373.47g/mol
- Monoisotopic mass
- 373.1460Da
- Atoms
- 49
- Elements
- 5
- Rings plus double bonds
- 10
The formula C19H23N3O3S describes a molecule made of 19 carbon atoms, 23 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 1 sulfur 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 × 1961.10%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 236.21%1.008 × 23 = 23.184 g/mol
- N Nitrogen × 311.25%14.007 × 3 = 42.021 g/mol
- O Oxygen × 312.85%15.999 × 3 = 47.997 g/mol
- S Sulfur × 18.58%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C19H23N3O3S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 209 compounds
![N-Cyclopentyl-2-[6-(2,5-dimethoxyphenyl)pyridazin-3-yl]sulfanylacetamide chemical structure, C19H23N3O3S, CAS 941931-20-0](/s/TTWLHPLVBGBRBC-UHFFFAOYSA-N.svg)
N-Cyclopentyl-2-[6-(2,5-dimethoxyphenyl)pyridazin-3-yl]sulfanylacetamide
CAS 941931-20-0C19H23N3O3S
![2-[(1-Acetyl-2-oxopropyl)thio]-N-cyclohexyl-1H-benzimidazole-1-carboxamide chemical structure, C19H23N3O3S, CAS 98183-15-4](/s/PYNJDHQMZUHVIC-UHFFFAOYSA-N.svg)
2-[(1-Acetyl-2-oxopropyl)thio]-N-cyclohexyl-1H-benzimidazole-1-carboxamide
CAS 98183-15-4C19H23N3O3S
N1-(2-(2-phenylmorpholino)ethyl)-N2-(thiophen-2-ylmethyl)oxalamide
CAS 954003-75-9C19H23N3O3S
![2-Benzamido-N-(3-methoxypropyl)-4,5,6,7-tetrahydrobenzo[d]thiazole-4-carboxamide chemical structure, C19H23N3O3S, CAS 955727-79-4](/s/QBKPJROSTZIHDZ-UHFFFAOYSA-N.svg)
2-Benzamido-N-(3-methoxypropyl)-4,5,6,7-tetrahydrobenzo[d]thiazole-4-carboxamide
CAS 955727-79-4C19H23N3O3S
![2-[(3,4-Dimethoxyphenyl)acetyl]-N-(2,3-dimethylphenyl)hydrazinecarbothioamide chemical structure, C19H23N3O3S, CAS 774185-58-9](/s/DDIFZGWWSGZEDS-UHFFFAOYSA-N.svg)
2-[(3,4-Dimethoxyphenyl)acetyl]-N-(2,3-dimethylphenyl)hydrazinecarbothioamide
CAS 774185-58-9C19H23N3O3S
![2-[(3,4-Dimethoxyphenyl)acetyl]-N-(4-methylbenzyl)hydrazinecarbothioamide chemical structure, C19H23N3O3S, CAS 774185-60-3](/s/JZCUXOCFVYJNBY-UHFFFAOYSA-N.svg)
2-[(3,4-Dimethoxyphenyl)acetyl]-N-(4-methylbenzyl)hydrazinecarbothioamide
CAS 774185-60-3C19H23N3O3S
![2-(Phenylamino)-1-[4-(phenylsulfonyl)-1-piperazinyl]-1-propanone chemical structure, C19H23N3O3S, CAS 1101842-88-9](/s/HPFIXZRMVOUBQW-UHFFFAOYSA-N.svg)
2-(Phenylamino)-1-[4-(phenylsulfonyl)-1-piperazinyl]-1-propanone
CAS 1101842-88-9C19H23N3O3S
N-(4-(6-(Ethylsulfonyl)pyridazin-3-yl)phenyl)cyclohexanecarboxamide
CAS 1005307-61-8C19H23N3O3S
![2-((1-(2-Hydroxyethyl)-2-oxo-2,5,6,7-tetrahydro-1H-cyclopenta[d]pyrimidin-4-yl)thio)-N-(4-methylbenzyl)acetamide chemical structure, C19H23N3O3S, CAS 941920-16-7](/s/ZPVJGWOTABCQFC-UHFFFAOYSA-N.svg)
2-((1-(2-Hydroxyethyl)-2-oxo-2,5,6,7-tetrahydro-1H-cyclopenta[d]pyrimidin-4-yl)thio)-N-(4-methylbenzyl)acetamide
CAS 941920-16-7C19H23N3O3S
N1-benzyl-N2-(2-morpholino-2-(thiophen-2-yl)ethyl)oxalamide
CAS 923140-34-5C19H23N3O3S
1-Benzyl-3-(1-(ethylsulfonyl)-1,2,3,4-tetrahydroquinolin-6-yl)urea
CAS 1203225-99-3C19H23N3O3S
![2-Cyclohexyl-N-[3-(6-methanesulfonylpyridazin-3-yl)phenyl]acetamide chemical structure, C19H23N3O3S, CAS 1114614-38-8](/s/AFKDTXOKCPLIGW-UHFFFAOYSA-N.svg)
2-Cyclohexyl-N-[3-(6-methanesulfonylpyridazin-3-yl)phenyl]acetamide
CAS 1114614-38-8C19H23N3O3S
![N-{3-[6-(Ethanesulfonyl)pyridazin-3-yl]phenyl}cyclohexanecarboxamide chemical structure, C19H23N3O3S, CAS 1114633-87-2](/s/GGDSSLPJOMSCKN-UHFFFAOYSA-N.svg)
N-{3-[6-(Ethanesulfonyl)pyridazin-3-yl]phenyl}cyclohexanecarboxamide
CAS 1114633-87-2C19H23N3O3S
![1-(Benzo[d][1,3]dioxol-5-yl)-3-((1-(thiophen-2-ylmethyl)piperidin-4-yl)methyl)urea chemical structure, C19H23N3O3S, CAS 1207017-67-1](/s/WSPPSNZMYBLJPZ-UHFFFAOYSA-N.svg)
1-(Benzo[d][1,3]dioxol-5-yl)-3-((1-(thiophen-2-ylmethyl)piperidin-4-yl)methyl)urea
CAS 1207017-67-1C19H23N3O3S
Phenyl 4-((3-(thiophen-2-ylmethyl)ureido)methyl)piperidine-1-carboxylate
CAS 1323542-29-5C19H23N3O3S
N-(2-Methoxyphenyl)-4-((thiophene-3-carboxamido)methyl)piperidine-1-carboxamide
CAS 1235305-08-4C19H23N3O3S
N1-(2-(2,3-dihydrobenzofuran-5-yl)-2-(dimethylamino)ethyl)-N2-(thiophen-2-ylmethyl)oxalamide
CAS 1428367-21-8C19H23N3O3S
N-((1-(Pyridin-3-yl)piperidin-4-yl)methyl)-2,3-dihydrobenzofuran-5-sulfonamide
CAS 2034379-37-6C19H23N3O3S
(3-(4-Methoxypiperidin-1-yl)azetidin-1-yl)(4-(thiazol-2-yloxy)phenyl)methanone
CAS 2034528-02-2C19H23N3O3S
![N-[4-(4-Phenylpiperazine-1-carbonyl)phenyl]ethanesulfonamide chemical structure, C19H23N3O3S, CAS 839688-81-2](/s/PVVYROYXYMNLSD-UHFFFAOYSA-N.svg)
N-[4-(4-Phenylpiperazine-1-carbonyl)phenyl]ethanesulfonamide
CAS 839688-81-2C19H23N3O3S
![1,2,3,4-Tetrahydro-2-methyl-1-isoquinolineacetic acid 2-[(4-methylphenyl)sulfonyl]hydrazide chemical structure, C19H23N3O3S, CAS 623910-00-9](/s/LTHMAXYSMLAAQZ-UHFFFAOYSA-N.svg)
1,2,3,4-Tetrahydro-2-methyl-1-isoquinolineacetic acid 2-[(4-methylphenyl)sulfonyl]hydrazide
CAS 623910-00-9C19H23N3O3S
![N-[4-[Cyclohexyl(methyl)sulfamoyl]phenyl]pyridine-4-carboxamide chemical structure, C19H23N3O3S, CAS 876522-53-1](/s/NBVUZTHUJPYQPY-UHFFFAOYSA-N.svg)
N-[4-[Cyclohexyl(methyl)sulfamoyl]phenyl]pyridine-4-carboxamide
CAS 876522-53-1C19H23N3O3S
N-(4-Methoxyphenethyl)-2-((2-oxo-1,2,5,6,7,8-hexahydroquinazolin-4-yl)thio)acetamide
CAS 946217-70-5C19H23N3O3S
N-(4-(Dimethylamino)phenyl)-4-(1,1-dioxido-1,2-thiazinan-2-yl)benzamide
CAS 899756-89-9C19H23N3O3S
- 2-[[Benzyl(2-hydroxyethyl)carbamoyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide903187-03-1C19H23N3O3S
- 5,5-Dimethyl-2-{[(2-phenylethyl)carbamoyl]amino}-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxamide905431-29-0C19H23N3O3S
- (E)-4-Butoxy-N-(2-(2-((3-methylthiophen-2-yl)methylene)hydrazinyl)-2-oxoethyl)benzamide391892-21-0C19H23N3O3S
- N-Methyl-N-(4-methylphenyl)-4-(phenylsulfonyl)-1-piperazinecarboxamide889808-79-1C19H23N3O3S
- N1-(2-(3,4-dihydroisoquinolin-2(1H)-yl)-2-(thiophen-2-yl)ethyl)-N2-(2-hydroxyethyl)oxalamide903260-96-8C19H23N3O3S
- 1-((1-(4-Ethoxyphenyl)-5-oxopyrrolidin-3-yl)methyl)-3-(thiophen-2-ylmethyl)urea954696-44-7C19H23N3O3S
- N1-(4-methoxyphenyl)-N2-(2-(pyrrolidin-1-yl)-2-(thiophen-3-yl)ethyl)oxalamide946200-59-5C19H23N3O3S
- N1-(2-(indolin-1-yl)-2-(thiophen-2-yl)ethyl)-N2-(2-methoxyethyl)oxalamide898452-16-9C19H23N3O3S
- N1-(3-hydroxypropyl)-N2-(2-(indolin-1-yl)-2-(thiophen-2-yl)ethyl)oxalamide898407-56-2C19H23N3O3S
- N-Benzyl-2-((1-(2-hydroxyethyl)-2-oxo-1,2,5,6,7,8-hexahydroquinazolin-4-yl)thio)acetamide941888-04-6C19H23N3O3S
- N1-(2-morpholino-2-(thiophen-2-yl)ethyl)-N2-(o-tolyl)oxalamide899999-19-0C19H23N3O3S
- N-(4-(Dimethylamino)benzyl)-4-(1,1-dioxidoisothiazolidin-2-yl)benzamide899976-64-8C19H23N3O3S
- 2-((1-Cyclohexyl-1H-imidazol-2-yl)thio)-N-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)acetamide946367-72-2C19H23N3O3S
- Methyl 4-{2-[(1-cyclohexyl-1H-imidazol-2-yl)sulfanyl]acetamido}benzoate946202-34-2C19H23N3O3S
- N-Ethyl-4-(2-oxopyrrolidin-1-yl)-N-(2-(pyridin-4-yl)ethyl)benzenesulfonamide919628-32-3C19H23N3O3S
- Methyl 4-{3-[4,6-dimethyl-2-(methylsulfanyl)pyrimidin-5-yl]propanamido}-3-methylbenzoate1017182-35-2C19H23N3O3S
- 1-(5-Ethyl-3,3-dimethyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepin-8-yl)-3-(thiophen-2-ylmethyl)urea1172719-01-5C19H23N3O3S
- Ethyl 4-[4-methyl-6-(methylsulfanyl)-2-(propan-2-yl)pyrimidine-5-amido]benzoate1030141-62-8C19H23N3O3S
- 1-[4,5-Dimethyl-2-(pentyloxy)benzenesulfonyl]-1H-1,2,3-benzotriazole1087640-81-0C19H23N3O3S
- N-[3-(1,3-Benzothiazol-2-yl)-1-(2-methoxyethyl)-4,5-dimethyl-1H-pyrrol-2-yl]-2-methoxyacetamide1144448-12-3C19H23N3O3S
- N-(4-(3-((2-(Cyclohex-1-en-1-yl)ethyl)amino)-3-oxopropyl)thiazol-2-yl)furan-2-carboxamide1021228-95-4C19H23N3O3S
- 1-[(1-Cyano-1,2-dimethylpropyl)carbamoyl]ethyl 3-(1,3-benzothiazol-2-yl)propanoate1209539-75-2C19H23N3O3S
- 2-((1-((5,6,7,8-Tetrahydronaphthalen-2-yl)sulfonyl)piperidin-4-yl)oxy)pyrazine1421480-48-9C19H23N3O3S
- (Cyclohexylcarbamoyl)methyl 3-cyano-6-cyclopropyl-2-(methylsulfanyl)pyridine-4-carboxylate1427707-28-5C19H23N3O3S
- 3-{[4-(1-{Bicyclo[2.2.1]heptan-2-yl}ethyl)-5-(furan-2-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}oxolan-2-one1797246-36-6C19H23N3O3S
- 1-{[2-(2-Propylpyridin-4-yl)-1,3-thiazol-4-yl]acetyl}piperidine-4-carboxylic acid1630869-74-7C19H23N3O3S
- 4-Acetyl-N-((1-(pyridin-4-yl)piperidin-4-yl)methyl)benzenesulfonamide2034231-47-3C19H23N3O3S
- (5-Methyl-1-phenyl-1H-pyrazol-4-yl)((1R,5S)-3-(methylsulfonyl)-8-azabicyclo[3.2.1]octan-8-yl)methanone1704512-58-2C19H23N3O3S
- 1-(3-Oxo-3-(7-(o-tolyl)-1,4-thiazepan-4-yl)propyl)pyrimidine-2,4(1H,3H)-dione1705508-45-7C19H23N3O3S
- N1-((1-(5-(1-hydroxyethyl)thiophen-2-yl)cyclopentyl)methyl)-N2-(pyridin-3-yl)oxalamide2034549-95-4C19H23N3O3S
- N-(5-Acetamido-2-methoxyphenyl)-6-(methylsulfanyl)-N-(propan-2-yl)pyridine-3-carboxamide1808836-55-6C19H23N3O3S
- N-(2-(4-Cyclopropyl-6-oxopyrimidin-1(6H)-yl)ethyl)-5,6,7,8-tetrahydronaphthalene-2-sulfonamide2034537-06-7C19H23N3O3S
- 2-Phenyl-N-(1,3,6-trimethyl-2,2-dioxido-1,3-dihydrobenzo[c][1,2,5]thiadiazol-5-yl)butanamide2034338-67-3C19H23N3O3S
- N-(1-(1,1-Dioxidotetrahydrothiophen-3-yl)piperidin-4-yl)isoquinoline-1-carboxamide2034224-10-5C19H23N3O3S
- 4-(Benzylsulfonyl)-N-(pyridin-2-ylmethyl)piperidine-1-carboxamide2034388-16-2C19H23N3O3S
- 2-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(4-ethylphenyl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2320381-68-6C19H23N3O3S
- N-(2,5-Dimethylphenyl)-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2320379-74-4C19H23N3O3S
- N-(2,4-Dimethylphenyl)-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2309711-51-9C19H23N3O3S
- N-(3,4-Dimethylphenyl)-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2319801-64-2C19H23N3O3S
- N-(3,5-Dimethylphenyl)-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2319801-87-9C19H23N3O3S
- 2-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-phenethyl-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2320171-95-5C19H23N3O3S
- 2-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(1-phenylethyl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2310153-86-5C19H23N3O3S
- N-Benzyl-2-(1,1-dioxidotetrahydrothiophen-3-yl)-N-methyl-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2309571-59-1C19H23N3O3S
- 2-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(4-methylbenzyl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2319805-12-2C19H23N3O3S
- 2-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(2-ethylphenyl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide2309311-25-7C19H23N3O3S
- 1-(1-(Naphthalen-1-ylsulfonyl)azetidin-3-yl)piperidine-4-carboxamide2034293-20-2C19H23N3O3S
- N-(1-(1,1-Dioxidotetrahydrothiophen-3-yl)piperidin-4-yl)quinoline-6-carboxamide2034331-91-2C19H23N3O3S
- (E)-4,6-Dimethyl-2-((1-(styrylsulfonyl)piperidin-3-yl)oxy)pyrimidine2097941-20-1C19H23N3O3S
- 2-Methanesulfonyl-5-methyl-N-[1-(3-methylphenyl)cyclopentyl]pyrimidine-4-carboxamide2262464-49-1C19H23N3O3S
- N-Methyl-N-[4-(4-phenylpiperazine-1-carbonyl)phenyl]methanesulfonamide641995-54-2C19H23N3O3S
- N-[4-[Cyclohexyl(methyl)sulfamoyl]phenyl]pyridine-3-carboxamide875108-81-9C19H23N3O3S
- N-[(2,3-Dihydro-1,4-benzodioxin-2-yl)methyl]-3-[4,6-dimethyl-2-(methylsulfanyl)pyrimidin-5-yl]propanamide924027-91-8C19H23N3O3S
- 5-Cyclopropyl-1-(1,1-dioxidotetrahydrothiophen-3-yl)-N-phenethyl-1H-pyrazole-3-carboxamide1019096-35-5C19H23N3O3S
- 4-(Benzenesulfonyl)-N-(2-ethylphenyl)piperazine-1-carboxamide895482-71-0C19H23N3O3S
- [Ethyl(2-methylprop-2-en-1-yl)carbamoyl]methyl 3-cyano-6-cyclopropyl-2-(methylsulfanyl)pyridine-4-carboxylate941146-97-0C19H23N3O3S
- 4-[(Methylsulfonyl)amino]-N-[4-(pyrrolidin-1-yl)benzyl]benzamide928907-67-9C19H23N3O3S
- N-[1-(1,3-Dioxaindan-5-yl)ethyl]-3-[4,6-dimethyl-2-(methylsulfanyl)pyrimidin-5-yl]propanamide1061351-78-7C19H23N3O3S
- 1-(5-tert-Butyl-2-propoxyphenyl)sulfonylbenzotriazole1206146-99-7C19H23N3O3S
- 1-(Benzo[d]isoxazol-3-yl)-N-(4-(diethylamino)-2-methylphenyl)methanesulfonamide1797160-17-8C19H23N3O3S
- 2-Methyl-4-{[1-(5,6,7,8-tetrahydronaphthalene-2-sulfonyl)pyrrolidin-3-yl]oxy}pyrimidine2034523-85-6C19H23N3O3S
- 1-[2-Ethoxy-4-methyl-5-(propan-2-yl)benzenesulfonyl]-5-methyl-1H-1,2,3-benzotriazole2361746-21-4C19H23N3O3S
- 1-(5-tert-Butyl-2-ethoxybenzenesulfonyl)-5-methyl-1H-1,2,3-benzotriazole2415489-74-4C19H23N3O3S
- 2-[1-(2-Phenoxyethanesulfonyl)-octahydropyrrolo[2,3-c]pyrrol-5-yl]pyridine2549066-76-2C19H23N3O3S
- 4-Methyl-N-[2-oxo-2-(4-phenylpiperazin-1-yl)ethyl]benzenesulfonamide693806-28-9C19H23N3O3S
- 2-[N-(Benzenesulfonyl)anilino]-N-(pentan-3-ylideneamino)acetamide5661-15-4C19H23N3O3S
- 3-Methyl-2-(2-phenylethenesulfonamido)-N-[(pyridin-2-yl)methyl]butanamide1008085-60-6C19H23N3O3S
- N-[4-(Dimethylamino)phenyl]-2-(N-methyl-2-phenylethenesulfonamido)acetamide2307507-40-8C19H23N3O3S
- Imidazo[1,5-a]pyrazine-7(1H)-carboxylic acid, 2-benzo[b]thien-5-ylhexahydro-3-oxo-, 1,1-dimethylethyl ester1002339-24-3C19H23N3O3S
- (S)-tert-Butyl 3-(5-phenylthiazol-2-ylcarbamoyl)pyrrolidine-1-carboxylate1895054-26-8C19H23N3O3S
- tert-Butyl 2-(benzylthio)-4-hydroxy-5,8-dihydropyrido[3,4-D]pyrimidine-7(6H)-carboxylate1393571-07-7C19H23N3O3S
- 4-{[1-(Cyclopropanesulfonyl)piperidin-4-yl]methoxy}-6-phenylpyrimidine2379986-04-4C19H23N3O3S
- N-Phenyl-3-[1-(prop-2-enoyl)piperidine-4-carbonyl]-1,3-thiazolidine-4-carboxamide2411193-47-8C19H23N3O3S
- 3-Thiophenecarboxamide, 4,5-dimethyl-2-[[[(1-oxopropyl)(phenylmethyl)amino]acetyl]amino]-606109-97-1C19H23N3O3S
- (9-Imino-9-oxido-1-oxa-9-thia-4-azaspiro[5.5]undecan-4-yl)(2-methylquinolin-4-yl)methanone2417948-02-6C19H23N3O3S
- 3-Cyclopropyl-6-{[1-(4-methylbenzenesulfonyl)pyrrolidin-3-yl]methoxy}pyridazine2549052-99-3C19H23N3O3S
- 3-{[5-(Benzenesulfonyl)-octahydropyrrolo[3,4-c]pyrrol-2-yl]methyl}-5-cyclopropyl-1,2-oxazole2640815-15-0C19H23N3O3S
Frequently asked questions
What is the molar mass of C19H23N3O3S?
The molar mass of C19H23N3O3S is 373.47 g/mol, calculated from standard atomic weights for 19 carbon atoms, 23 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 373.1460 Da.
How many compounds have the formula C19H23N3O3S?
CompoundList lists 209 compounds with the molecular formula C19H23N3O3S, including N-Cyclopentyl-2-[6-(2,5-dimethoxyphenyl)pyridazin-3-yl]sulfanylacetamide, 2-[(1-Acetyl-2-oxopropyl)thio]-N-cyclohexyl-1H-benzimidazole-1-carboxamide, N1-(2-(2-phenylmorpholino)ethyl)-N2-(thiophen-2-ylmethyl)oxalamide. 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 C19H23N3O3S?
C19H23N3O3S has a degree of unsaturation of 10. 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.