Molecular formula
C19H18N4O3S
223 compounds have this formula on CompoundList.
- Molar mass
- 382.44g/mol
- Monoisotopic mass
- 382.1100Da
- Atoms
- 45
- Elements
- 5
- Rings plus double bonds
- 13
The formula C19H18N4O3S describes a molecule made of 19 carbon atoms, 18 hydrogen atoms, 4 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 × 1959.67%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 184.74%1.008 × 18 = 18.144 g/mol
- N Nitrogen × 414.65%14.007 × 4 = 56.028 g/mol
- O Oxygen × 312.55%15.999 × 3 = 47.997 g/mol
- S Sulfur × 18.38%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C19H18N4O3S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 223 compounds
LY-3130481
CAS 1610802-47-5C19H18N4O3S
2-(1,3-Benzoxazol-2-ylsulfanyl)-N-(7,7-dimethyl-5-oxo-5,6,7,8-tetrahydroquinazolin-2-yl)acetamide
CAS 517869-56-6C19H18N4O3S
![4-[2-(Cyanomethylsulfanyl)-4-oxoquinazolin-3-yl]-N-(furan-2-ylmethyl)butanamide chemical structure, C19H18N4O3S, CAS 451465-19-3](/s/VETXBYQFOAVOJR-UHFFFAOYSA-N.svg)
4-[2-(Cyanomethylsulfanyl)-4-oxoquinazolin-3-yl]-N-(furan-2-ylmethyl)butanamide
CAS 451465-19-3C19H18N4O3S
![N-{4-[(4-Methylpyrimidin-2-yl)sulfamoyl]phenyl}-2-phenylacetamide chemical structure, C19H18N4O3S, CAS 102017-63-0](/s/ADIGYJPISRQNFC-UHFFFAOYSA-N.svg)
N-{4-[(4-Methylpyrimidin-2-yl)sulfamoyl]phenyl}-2-phenylacetamide
CAS 102017-63-0C19H18N4O3S
![6-Phenyl-3-(3,4,5-trimethoxyphenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine chemical structure, C19H18N4O3S, CAS 67572-55-8](/s/SVXFWFLYWFSIIF-UHFFFAOYSA-N.svg)
6-Phenyl-3-(3,4,5-trimethoxyphenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine
CAS 67572-55-8C19H18N4O3S
4-Morpholin-4-yl-1,2,5-thiadiazol-3-yl diphenylcarbamate
CAS 526190-64-7C19H18N4O3S
N-(3,5-Dimethoxyphenyl)-2-((6-(pyridin-2-yl)pyridazin-3-yl)thio)acetamide
CAS 892439-53-1C19H18N4O3S
6-(3-(4-Methoxyphenyl)-1-(methylsulfonyl)-4,5-dihydro-1H-pyrazol-5-yl)quinoxaline
CAS 797775-36-1C19H18N4O3S
![7-Cyclopropyl-1,3-dimethyl-5-phenacylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione chemical structure, C19H18N4O3S, CAS 863003-29-6](/s/DHEQHASXSVCXNF-UHFFFAOYSA-N.svg)
7-Cyclopropyl-1,3-dimethyl-5-phenacylsulfanylpyrimido[4,5-d]pyrimidine-2,4-dione
CAS 863003-29-6C19H18N4O3S
![N-[[5-[2-(Benzylamino)-2-oxoethyl]sulfanyl-1,3,4-oxadiazol-2-yl]methyl]benzamide chemical structure, C19H18N4O3S, CAS 903312-15-2](/s/MZSXUFJAQVFYAJ-UHFFFAOYSA-N.svg)
N-[[5-[2-(Benzylamino)-2-oxoethyl]sulfanyl-1,3,4-oxadiazol-2-yl]methyl]benzamide
CAS 903312-15-2C19H18N4O3S
4-(((3-Mercapto-5-(3-ME-PH)-4H-1,2,4-triazol-4-yl)imino)ME)-2-meo-phenyl acetate
CAS 478256-22-3C19H18N4O3S
![Methyl 4-({[(5-methyl-4-phenyl-4H-1,2,4-triazol-3-yl)thio]acetyl}amino)benzoate chemical structure, C19H18N4O3S, CAS 332883-22-4](/s/ZZXRSQNBCFFVJK-UHFFFAOYSA-N.svg)
Methyl 4-({[(5-methyl-4-phenyl-4H-1,2,4-triazol-3-yl)thio]acetyl}amino)benzoate
CAS 332883-22-4C19H18N4O3S
![2-(4-Methylphenyl)-N-[4-(pyrimidin-2-ylsulfamoyl)phenyl]acetamide chemical structure, C19H18N4O3S, CAS 587843-94-5](/s/VYFJBZVFZRPYBM-UHFFFAOYSA-N.svg)
2-(4-Methylphenyl)-N-[4-(pyrimidin-2-ylsulfamoyl)phenyl]acetamide
CAS 587843-94-5C19H18N4O3S
![8,9-Dimethoxy-2-[(2-methylphenoxy)methyl][1,2,4]triazolo[1,5-c]quinazoline-5(6H)-thione chemical structure, C19H18N4O3S, CAS 901755-60-0](/s/RCRYNJFCZZBEGN-UHFFFAOYSA-N.svg)
8,9-Dimethoxy-2-[(2-methylphenoxy)methyl][1,2,4]triazolo[1,5-c]quinazoline-5(6H)-thione
CAS 901755-60-0C19H18N4O3S
![Ethyl {[6-amino-3,5-dicyano-4-(4-ethoxyphenyl)pyridin-2-yl]thio}acetate chemical structure, C19H18N4O3S, CAS 361477-85-2](/s/VXSYOTWMARIFQS-UHFFFAOYSA-N.svg)
Ethyl {[6-amino-3,5-dicyano-4-(4-ethoxyphenyl)pyridin-2-yl]thio}acetate
CAS 361477-85-2C19H18N4O3S
![6-Benzyl-3-(3,4,5-trimethoxyphenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole chemical structure, C19H18N4O3S, CAS 825605-53-6](/s/GYTVJYMBZHUBLD-UHFFFAOYSA-N.svg)
6-Benzyl-3-(3,4,5-trimethoxyphenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole
CAS 825605-53-6C19H18N4O3S
![3-[2-(1,3-Benzothiazol-2-yl)hydrazinyl]-1-(4-ethoxyphenyl)pyrrolidine-2,5-dione chemical structure, C19H18N4O3S, CAS 956373-20-9](/s/DLNPDSVWVHPIMM-UHFFFAOYSA-N.svg)
3-[2-(1,3-Benzothiazol-2-yl)hydrazinyl]-1-(4-ethoxyphenyl)pyrrolidine-2,5-dione
CAS 956373-20-9C19H18N4O3S
Methyl 5-(((4-ethyl-5-(1H-indol-3-yl)-4H-1,2,4-triazol-3-yl)thio)methyl)furan-2-carboxylate
CAS 852144-24-2C19H18N4O3S
![1-Allyl-3-((4-methoxyphenyl)sulfonyl)-2,3-dihydro-1H-imidazo[4,5-b]quinoxaline chemical structure, C19H18N4O3S, CAS 844650-15-3](/s/AUNVWUZMSGDVTI-UHFFFAOYSA-N.svg)
1-Allyl-3-((4-methoxyphenyl)sulfonyl)-2,3-dihydro-1H-imidazo[4,5-b]quinoxaline
CAS 844650-15-3C19H18N4O3S
Ilaprazole sulfone
CAS 172152-37-3C19H18N4O3S
N-(2,5-Dimethoxyphenyl)-2-(6-pyridin-3-ylpyridazin-3-yl)sulfanylacetamide
CAS 872701-89-8C19H18N4O3S
N-(3,5-Dimethoxyphenyl)-2-(6-pyridin-3-ylpyridazin-3-yl)sulfanylacetamide
CAS 892439-60-0C19H18N4O3S
ME 4-(((3-(3-Ethoxyphenyl)-5-mercapto-4H-1,2,4-triazol-4-yl)imino)ME)benzoate
CAS 733031-47-5C19H18N4O3S
![3-(3-Methylphenyl)-6-(3,4,5-trimethoxyphenyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole chemical structure, C19H18N4O3S, CAS 794549-84-1](/s/YDQGXXNEBYANBK-UHFFFAOYSA-N.svg)
3-(3-Methylphenyl)-6-(3,4,5-trimethoxyphenyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole
CAS 794549-84-1C19H18N4O3S
- 6-[(2-Ethoxyphenoxy)methyl]-3-(phenoxymethyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole708997-08-4C19H18N4O3S
- 3-Benzyl-6-(3,4,5-trimethoxyphenyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole708251-12-1C19H18N4O3S
- N-[(5-Phenacylsulfanyl-4-prop-2-enyl-1,2,4-triazol-3-yl)methyl]furan-2-carboxamide713498-91-0C19H18N4O3S
- 2-((6-(4-Methoxybenzyl)-5-oxo-4,5-dihydro-1,2,4-triazin-3-yl)thio)-N-phenylacetamide898624-16-3C19H18N4O3S
- N-(Methylcarbamoyl)-2-phenyl-2-((5-(p-tolyl)-1,3,4-oxadiazol-2-yl)thio)acetamide875863-22-2C19H18N4O3S
- N-((5-((2-(Methyl(phenyl)amino)-2-oxoethyl)thio)-1,3,4-oxadiazol-2-yl)methyl)benzamide903267-60-7C19H18N4O3S
- N-(2,4-Dimethoxyphenyl)-2-(6-pyridin-3-ylpyridazin-3-yl)sulfanylacetamide872701-87-6C19H18N4O3S
- N-{4-[2-({4-Hydroxy-5,7-dimethylpyrido[2,3-d]pyrimidin-2-yl}sulfanyl)acetyl]phenyl}acetamide429654-38-6C19H18N4O3S
- 2-{2-Amino-3-[(4-methylphenyl)sulfonyl]-1H-pyrrolo[2,3-b]quinoxalin-1-yl}ethanol300376-28-7C19H18N4O3S
- Egfr-IN-52454436-75-0C19H18N4O3S
- 3-Phenyl-N-[4-(pyrimidin-2-ylsulfamoyl)-phenyl]-propionamide431892-73-8C19H18N4O3S
- 1-[(6-Aminopyridin-3-Yl)methyl]-3-[4-(Phenylsulfonyl)phenyl]urea1363130-82-8C19H18N4O3S
- 2-(Furan-2-yl)-5-(morpholino(phenyl)methyl)thiazolo[3,2-b][1,2,4]triazol-6-ol887219-56-9C19H18N4O3S
- 5-(3-Ethylsulfanyl-6,7-dihydro-[1,2,4]triazino[5,6-d][3,1]benzoxazepin-6-yl)-2-methoxyphenol6377-26-0C19H18N4O3S
- 2-((E)-2-((E)-(4-Methoxybenzylidene)hydrazono)-4-oxothiazolidin-5-yl)-N-phenylacetamide540762-56-9C19H18N4O3S
- N-(1-(2-Methoxyacetyl)-1,2,3,4-tetrahydroquinolin-7-yl)benzo[c][1,2,5]thiadiazole-5-carboxamide1207003-64-2C19H18N4O3S
- N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-(2-((4-methylpyridin-2-yl)amino)thiazol-4-yl)acetamide1324466-74-1C19H18N4O3S
- 2-(2-Methyl-3-(6-oxo-3-(thiophen-2-yl)pyridazin-1(6H)-yl)propanamido)benzamide1286705-86-9C19H18N4O3S
- 3-Isobutyl-1-((3-(thiophen-2-yl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione1105197-30-5C19H18N4O3S
- N-(Furan-2-ylmethyl)-N-(4-methoxybenzo[d]thiazol-2-yl)-1,3-dimethyl-1H-pyrazole-5-carboxamide1013795-48-6C19H18N4O3S
- 6-(2-Methylphenyl)-3-(3,4,5-trimethoxyphenyl)-1,2,4-triazolo(3,4-b)(1,3,4)thiadiazole843620-92-8C19H18N4O3S
- Triazolothiadiazine, 8E1003846-58-9C19H18N4O3S
- 1-(Benzo[d]thiazol-2-yl)-3-(1-(3-methoxyphenyl)-5-oxopyrrolidin-3-yl)urea894021-43-3C19H18N4O3S
- 2-((1-(2,3-Dimethylphenyl)-1H-imidazol-2-yl)thio)-N-(4-nitrophenyl)acetamide851131-66-3C19H18N4O3S
- 4-{4-[6-Oxo-3-(thiophen-2-yl)-1,6-dihydropyridazin-1-yl]butanamido}benzamide1021260-15-0C19H18N4O3S
- 2-(1-(4-Methylbenzyl)-6-oxo-1,6-dihydropyridine-3-carbonyl)-N-(thiophen-2-yl)hydrazinecarboxamide1105227-04-0C19H18N4O3S
- (E)-Methyl 2-((1-ethyl-3-methyl-1H-pyrazole-5-carbonyl)imino)-3-(prop-2-yn-1-yl)-2,3-dihydrobenzo[d]thiazole-6-carboxylate1173389-25-7C19H18N4O3S
- N-(4-(7-Ethoxybenzofuran-2-yl)thiazol-2-yl)-1-ethyl-1H-pyrazole-3-carboxamide1170020-81-1C19H18N4O3S
- N-(6-((2-((2,3-Dimethylphenyl)amino)-2-oxoethyl)thio)pyridazin-3-yl)furan-2-carboxamide1021061-38-0C19H18N4O3S
- N-(6-((2-Oxo-2-(phenethylamino)ethyl)thio)pyridazin-3-yl)furan-2-carboxamide1021136-13-9C19H18N4O3S
- (4-(Furan-2-carbonyl)piperazin-1-yl)(2-(phenylamino)thiazol-4-yl)methanone1170582-20-3C19H18N4O3S
- 2-(2-((3-Methoxybenzyl)thio)-6-oxo-1,6-dihydropyrimidin-4-yl)-N-(pyridin-3-yl)acetamide1105237-08-8C19H18N4O3S
- 2-((1-(4-Nitrophenyl)-1H-imidazol-2-yl)thio)-N-phenethylacetamide851079-73-7C19H18N4O3S
- 1-(2-Cyanophenyl)-3-{2-[(2-methyl-1H-indol-3-yl)sulfonyl]ethyl}urea946219-22-3C19H18N4O3S
- N-(6-((2-((Furan-2-ylmethyl)amino)-2-oxoethyl)thio)pyridazin-3-yl)-4-methylbenzamide1021264-79-8C19H18N4O3S
- 2-[(3,5-Dimethylphenyl)amino]-7,8-dimethoxy-5H-[1,3,4]thiadiazolo[2,3-b]quinazolin-5-one1040654-86-1C19H18N4O3S
- N-Allyl-3,5-dimethoxy-N-(5-pyridin-4-yl-[1,3,4]thiadiazol-2-yl)-benzamide510725-28-7C19H18N4O3S
- N-[4-(Morpholine-4-carbonyl)-2-phenylpyrazol-3-yl]thiophene-2-carboxamide5581-58-8C19H18N4O3S
- N-(2,5-Dimethoxyphenyl)-2-{[6-(pyridin-2-yl)pyridazin-3-yl]sulfanyl}acetamide892438-75-4C19H18N4O3S
- 2-Methyl-N-{4-[(4-methylpyrimidin-2-yl)sulfamoyl]phenyl}benzamide349145-10-4C19H18N4O3S
- 6-(3,4-Dimethoxyphenyl)-3-(4-methoxybenzyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole874464-24-1C19H18N4O3S
- 6-(3-(3-Methoxyphenyl)-1-(methylsulfonyl)-4,5-dihydro-1H-pyrazol-5-yl)quinoxaline941913-18-4C19H18N4O3S
- 3-[2-Amino-3-(benzenesulfonyl)-1H-pyrrolo[2,3-b]quinoxalin-1-yl]propan-1-ol300375-86-4C19H18N4O3S
- 1-(4-Methylphenyl)-3-[4-(pyridin-2-ylsulfamoyl)phenyl]urea774552-76-0C19H18N4O3S
- 3-Benzamido-N-[5-(ethoxymethyl)-1,3,4-thiadiazol-2-yl]benzamide701228-56-0C19H18N4O3S
- 3-Methyl-N-{4-[(4-methylpyrimidin-2-yl)sulfamoyl]phenyl}benzamide110937-75-2C19H18N4O3S
- Ethyl 4-({[(1-phenyl-1H-1,2,4-triazol-3-yl)sulfanyl]acetyl}amino)benzoate663201-65-8C19H18N4O3S
- 1-(4-Methoxyphenyl)-4-[(4-methylphenyl)sulfanyl]-6-oxo-1,6-dihydro-3-pyridazinecarbohydrazide338395-92-9C19H18N4O3S
- 4-(5-(Benzylamino)-4-cyanooxazol-2-yl)-N,N-dimethylbenzenesulfonamide941265-04-9C19H18N4O3S
- N-Benzyl-4-(4-cyano-5-(methylamino)oxazol-2-yl)-N-methylbenzenesulfonamide941003-76-5C19H18N4O3S
- 6-(3-(2-Methoxyphenyl)-1-(methylsulfonyl)-4,5-dihydro-1H-pyrazol-5-yl)quinoxaline946361-42-8C19H18N4O3S
- 4-((3,5-Dimethylisoxazol-4-yl)methyl)-6-(3-methylbenzyl)isothiazolo[4,3-d]pyrimidine-5,7(4H,6H)-dione1428363-76-1C19H18N4O3S
- 2-(2-(4-Methylbenzoyl)hydrazinyl)-4-oxo-N-phenyl-5,6-dihydro-4H-1,3-thiazine-6-carboxamide577963-23-6C19H18N4O3S
- N-(4-Methoxyphenyl)-2-{[6-(4-methylphenyl)-5-oxo-4,5-dihydro-1,2,4-triazin-3-yl]sulfanyl}acetamide881439-78-7C19H18N4O3S
- 3-Amino-N-(1,3-benzodioxol-5-yl)-6-methyl-5,6,7,8-tetrahydrothieno[2,3-b][1,6]naphthyridine-2-carboxamide607699-17-2C19H18N4O3S
- N-(1,3-Benzodioxol-5-yl)-2-[(4-ethyl-5-phenyl-1,2,4-triazol-3-yl)sulfanyl]acetamide558449-59-5C19H18N4O3S
- 3-Amino-4,6-dimethyl-N-(4-nitrophenyl)-5-prop-2-enylthieno[2,3-b]pyridine-2-carboxamide693238-23-2C19H18N4O3S
- N-(1,3-Benzodioxol-5-yl)-2-[[4-methyl-5-(3-methylphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetamide792944-85-5C19H18N4O3S
- N-[(5-Methylfuran-2-yl)methyl]-3-{3-oxo-5-sulfanylidene-2H,3H,5H,6H-imidazo[1,2-c]quinazolin-2-yl}propanamide1028685-29-1C19H18N4O3S
- N-(3,4-Dimethoxyphenyl)-2-(6-pyridin-4-ylpyridazin-3-yl)sulfanylacetamide872701-85-4C19H18N4O3S
- 5-{[2-(2,3-Dihydro-1H-indol-1-yl)-2-oxoethyl]sulfanyl}-1,3-dimethyl-1H,2H,3H,4H-pyrido[2,3-d]pyrimidine-2,4-dione923069-59-4C19H18N4O3S
- 4-Methoxy-N-(4-(2-oxo-2-((pyridin-3-ylmethyl)amino)ethyl)thiazol-2-yl)benzamide941898-75-5C19H18N4O3S
- N-(4-Methoxyphenyl)-1-methyl-6-oxo-2-((pyridin-2-ylmethyl)thio)-1,6-dihydropyrimidine-5-carboxamide891108-21-7C19H18N4O3S
- N-(3-Methoxyphenyl)-1-methyl-6-oxo-2-{[(pyridin-2-yl)methyl]sulfanyl}-1,6-dihydropyrimidine-5-carboxamide891109-32-3C19H18N4O3S
- N-(6-((2-Methoxybenzyl)oxy)pyrimidin-4-yl)-2-(pyridin-4-ylthio)acetamide1421530-96-2C19H18N4O3S
- N-(2-(1-Methyl-4-(thiophen-2-yl)-1H-imidazol-2-yl)ethyl)-2-(2-oxobenzo[d]oxazol-3(2H)-yl)acetamide1396709-41-3C19H18N4O3S
- N-((5-(Furan-2-yl)-1-(2-methoxyethyl)-1H-pyrazol-3-yl)methyl)benzo[d]thiazole-2-carboxamide1421526-21-7C19H18N4O3S
- N-(3-Methoxyphenyl)-2-{[6-(4-methylphenyl)-5-oxo-4,5-dihydro-1,2,4-triazin-3-yl]sulfanyl}acetamide881436-21-1C19H18N4O3S
- 3-(5-(1-(2-(Ethylthio)benzoyl)azetidin-3-yl)-1,2,4-oxadiazol-3-yl)pyridin-2(1H)-one1396798-20-1C19H18N4O3S
- 2-(3,5-Dimethyl-4-nitropyrazol-1-yl)-N-(2-phenylsulfanylphenyl)acetamide491828-94-5C19H18N4O3S
- 3-(4-Methylphenyl)-6-(3,4,5-trimethoxyphenyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole799782-90-4C19H18N4O3S
- 3-(3,4-Dimethoxyphenyl)-6-(4-ethoxyphenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole577986-75-5C19H18N4O3S
- 3-(3,4-Dimethoxyphenyl)-6-(3-ethoxyphenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole578734-26-6C19H18N4O3S
- 2-{[9-(2-Phenoxyethyl)-9H-[1,2,4]triazolo[4,3-a]benzimidazol-3-yl]sulfanyl}propanoic acid677346-00-8C19H18N4O3S
- 2-(1,3-Benzothiazol-2-yloxy)-N-(7,7-dimethyl-5-oxo-5,6,7,8-tetrahydroquinazolin-2-yl)acetamide945327-69-5C19H18N4O3S
- N-(4-{2-[(3-Methylphenyl)carbamoyl]ethyl}-1,3-thiazol-2-yl)-2-oxo-1,2-dihydropyridine-3-carboxamide1040640-98-9C19H18N4O3S
Frequently asked questions
What is the molar mass of C19H18N4O3S?
The molar mass of C19H18N4O3S is 382.44 g/mol, calculated from standard atomic weights for 19 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 382.1100 Da.
How many compounds have the formula C19H18N4O3S?
CompoundList lists 223 compounds with the molecular formula C19H18N4O3S, including LY-3130481, 2-(1,3-Benzoxazol-2-ylsulfanyl)-N-(7,7-dimethyl-5-oxo-5,6,7,8-tetrahydroquinazolin-2-yl)acetamide, 4-[2-(Cyanomethylsulfanyl)-4-oxoquinazolin-3-yl]-N-(furan-2-ylmethyl)butanamide. 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 C19H18N4O3S?
C19H18N4O3S has a degree of unsaturation of 13. 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.