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 1 to 100 of 209 compounds
![2-[(2Z)-2-(Cyclooctylidenehydrazinylidene)-4-oxo-3-phenyl-1,3-thiazolidin-5-yl]acetic acid chemical structure, C19H23N3O3S, CAS 312502-20-8](/s/SUNHNCOUVBVRPZ-VZCXRCSSSA-N.svg)
2-[(2Z)-2-(Cyclooctylidenehydrazinylidene)-4-oxo-3-phenyl-1,3-thiazolidin-5-yl]acetic acid
CAS 312502-20-8C19H23N3O3S
![1-[[1-(Benzenesulfonyl)piperidin-4-yl]methyl]-3-phenylurea chemical structure, C19H23N3O3S, CAS 686272-34-4](/s/DIZLHJOXELQNCK-UHFFFAOYSA-N.svg)
1-[[1-(Benzenesulfonyl)piperidin-4-yl]methyl]-3-phenylurea
CAS 686272-34-4C19H23N3O3S
![N-[2-(4-Methylsulfonylpiperazin-1-yl)phenyl]-2-phenylacetamide chemical structure, C19H23N3O3S, CAS 723754-28-7](/s/SYEXKBHYZAGRCZ-UHFFFAOYSA-N.svg)
N-[2-(4-Methylsulfonylpiperazin-1-yl)phenyl]-2-phenylacetamide
CAS 723754-28-7C19H23N3O3S
![1-Ethyl-6-[(4-ethylpiperazin-1-yl)sulfonyl]benzo[cd]indol-2(1H)-one chemical structure, C19H23N3O3S, CAS 438489-21-5](/s/UPFOBZMYUGWFKE-UHFFFAOYSA-N.svg)
1-Ethyl-6-[(4-ethylpiperazin-1-yl)sulfonyl]benzo[cd]indol-2(1H)-one
CAS 438489-21-5C19H23N3O3S
![4-[4-(4-Methylphenyl)-5-(4-morpholinylcarbonyl)-1,3-thiazol-2-yl]morpholine chemical structure, C19H23N3O3S, CAS 791786-54-4](/s/PMJZCOPHQLPYLD-UHFFFAOYSA-N.svg)
4-[4-(4-Methylphenyl)-5-(4-morpholinylcarbonyl)-1,3-thiazol-2-yl]morpholine
CAS 791786-54-4C19H23N3O3S
![Ethyl 1-{2-oxo-2-[(4-phenyl-1,3-thiazol-2-yl)amino]ethyl}piperidine-3-carboxylate chemical structure, C19H23N3O3S, CAS 879618-47-0](/s/OQILUCZKMMCJSH-UHFFFAOYSA-N.svg)
Ethyl 1-{2-oxo-2-[(4-phenyl-1,3-thiazol-2-yl)amino]ethyl}piperidine-3-carboxylate
CAS 879618-47-0C19H23N3O3S
![N-Cyclohexyl-2-[4-(2-methoxyphenyl)-3-oxopyrazin-2-yl]sulfanylacetamide chemical structure, C19H23N3O3S, CAS 899759-30-9](/s/PSOOGHUOYLXLHZ-UHFFFAOYSA-N.svg)
N-Cyclohexyl-2-[4-(2-methoxyphenyl)-3-oxopyrazin-2-yl]sulfanylacetamide
CAS 899759-30-9C19H23N3O3S
![3-Methyl-N-[4-(4-methylsulfonylpiperazin-1-yl)phenyl]benzamide chemical structure, C19H23N3O3S, CAS 674358-11-3](/s/NTGSKKRNCOSDBS-UHFFFAOYSA-N.svg)
3-Methyl-N-[4-(4-methylsulfonylpiperazin-1-yl)phenyl]benzamide
CAS 674358-11-3C19H23N3O3S
1-(4-Methylphenyl)sulfonyl-N-(pyridin-3-ylmethyl)piperidine-4-carboxamide
CAS 551931-42-1C19H23N3O3S
![2-Methyl-N-{4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}benzamide chemical structure, C19H23N3O3S, CAS 712318-71-3](/s/OQWWPXBIRADCIW-UHFFFAOYSA-N.svg)
2-Methyl-N-{4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}benzamide
CAS 712318-71-3C19H23N3O3S
![4-Methyl-N-{4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}benzamide chemical structure, C19H23N3O3S, CAS 791791-43-0](/s/WVIUWUIMMGCYCO-UHFFFAOYSA-N.svg)
4-Methyl-N-{4-[(4-methyl-1-piperazinyl)sulfonyl]phenyl}benzamide
CAS 791791-43-0C19H23N3O3S
![2-[Hydroxy(diphenyl)acetyl]-N-(3-methoxypropyl)hydrazinecarbothioamide chemical structure, C19H23N3O3S, CAS 706765-01-7](/s/GSIDKPWMMRNCCX-UHFFFAOYSA-N.svg)
2-[Hydroxy(diphenyl)acetyl]-N-(3-methoxypropyl)hydrazinecarbothioamide
CAS 706765-01-7C19H23N3O3S
N-Cyclopentyl-2-((6-(3,4-dimethoxyphenyl)pyridazin-3-yl)thio)acetamide
CAS 893991-88-3C19H23N3O3S
2-((6-(4-Ethoxyphenyl)pyridazin-3-yl)thio)-N-((tetrahydrofuran-2-yl)methyl)acetamide
CAS 872689-24-2C19H23N3O3S
3-(Azepan-1-ylsulfonyl)-4-methyl-N-pyridin-3-ylbenzamide
CAS 890594-33-9C19H23N3O3S
![2-[4-(Benzenesulfonyl)piperazin-1-yl]-N-benzylacetamide chemical structure, C19H23N3O3S, CAS 890282-01-6](/s/NSKYAYXQINWRJX-UHFFFAOYSA-N.svg)
2-[4-(Benzenesulfonyl)piperazin-1-yl]-N-benzylacetamide
CAS 890282-01-6C19H23N3O3S
![N-Cyclopentyl-2-[4-(4-ethoxyphenyl)-3-oxopyrazin-2-yl]sulfanylacetamide chemical structure, C19H23N3O3S, CAS 899945-19-8](/s/KCZDDSOYYPUQOZ-UHFFFAOYSA-N.svg)
N-Cyclopentyl-2-[4-(4-ethoxyphenyl)-3-oxopyrazin-2-yl]sulfanylacetamide
CAS 899945-19-8C19H23N3O3S
![4-[(2-Methylpiperidin-1-yl)sulfonyl]-N-(6-methylpyridin-2-yl)benzamide chemical structure, C19H23N3O3S, CAS 683762-67-6](/s/ZYCNENRSZBESMG-UHFFFAOYSA-N.svg)
4-[(2-Methylpiperidin-1-yl)sulfonyl]-N-(6-methylpyridin-2-yl)benzamide
CAS 683762-67-6C19H23N3O3S
![4-[(4-Methylpiperidin-1-yl)sulfonyl]-N-(6-methylpyridin-2-yl)benzamide chemical structure, C19H23N3O3S, CAS 683762-65-4](/s/DBODUFPUWQEVSW-UHFFFAOYSA-N.svg)
4-[(4-Methylpiperidin-1-yl)sulfonyl]-N-(6-methylpyridin-2-yl)benzamide
CAS 683762-65-4C19H23N3O3S
![4-Methyl-N-[4-(4-methylsulfonylpiperazin-1-yl)phenyl]benzamide chemical structure, C19H23N3O3S, CAS 673494-96-7](/s/SDCYVRHHNHAUCL-UHFFFAOYSA-N.svg)
4-Methyl-N-[4-(4-methylsulfonylpiperazin-1-yl)phenyl]benzamide
CAS 673494-96-7C19H23N3O3S
![N-{1-[(Furan-2-ylmethyl)-thiocarbamoyl]-piperidin-4-yl}-4-methoxy-benzamide chemical structure, C19H23N3O3S, CAS 606112-41-8](/s/ZLVVNKJFAFIYQV-UHFFFAOYSA-N.svg)
N-{1-[(Furan-2-ylmethyl)-thiocarbamoyl]-piperidin-4-yl}-4-methoxy-benzamide
CAS 606112-41-8C19H23N3O3S
4-(Azepan-1-ylsulfonyl)-N-(4-methylpyridin-2-yl)benzamide
CAS 868212-99-1C19H23N3O3S
![N-{4-[(4-Benzylpiperazin-1-yl)sulfonyl]phenyl}acetamide chemical structure, C19H23N3O3S, CAS 294885-65-7](/s/PZYRIUKFVOLMJR-UHFFFAOYSA-N.svg)
N-{4-[(4-Benzylpiperazin-1-yl)sulfonyl]phenyl}acetamide
CAS 294885-65-7C19H23N3O3S
![4-(Benzenesulfonyl)-N-[(4-methylphenyl)methyl]piperazine-1-carboxamide chemical structure, C19H23N3O3S, CAS 878265-31-7](/s/LVYHGOIQURDNRD-UHFFFAOYSA-N.svg)
4-(Benzenesulfonyl)-N-[(4-methylphenyl)methyl]piperazine-1-carboxamide
CAS 878265-31-7C19H23N3O3S
- 3-(Azepan-1-ylsulfonyl)-N-(4-methylpyridin-2-yl)benzamide314043-73-7C19H23N3O3S
- N-Methyl-N-phenyl-4-tosylpiperazine-1-carboxamide526190-61-4C19H23N3O3S
- N-[3-Oxo-3-(4-phenylpiperazin-1-yl)propyl]benzenesulfonamide915874-42-9C19H23N3O3S
- 1-(4-Methylphenyl)sulfonyl-N-(pyridin-4-ylmethyl)piperidine-4-carboxamide433693-38-0C19H23N3O3S
- 1-(4-Methylphenyl)sulfonyl-N-(pyridin-2-ylmethyl)piperidine-4-carboxamide433705-79-4C19H23N3O3S
- N-{4-[(4-Methyl-1-piperidinyl)sulfonyl]phenyl}-N'-phenylurea315671-59-1C19H23N3O3S
- N-Methyl-N-[2-oxo-2-(4-phenylpiperazin-1-yl)ethyl]benzenesulfonamide593262-22-7C19H23N3O3S
- N-(2-((4-Phenylpiperazin-1-yl)sulfonyl)ethyl)benzamide899955-86-3C19H23N3O3S
- 4-Butoxy-N-(2-imidazo[1,2-a]pyridin-2-ylethyl)benzenesulfonamide868978-67-0C19H23N3O3S
- N-(4-{4-[2-Hydroxy-2-(thiophen-2-yl)ethyl]piperazine-1-carbonyl}phenyl)acetamide1251561-98-4C19H23N3O3S
- 1-(Benzo[d][1,3]dioxol-5-yl)-3-((1-(thiophen-3-ylmethyl)piperidin-4-yl)methyl)urea1235282-00-4C19H23N3O3S
- N-(4-(2-((1-Hydroxy-2-methylpropan-2-yl)amino)-2-oxoethyl)phenyl)-2-(methylthio)nicotinamide1235098-10-8C19H23N3O3S
- 3-(3-(Thiophen-2-ylmethyl)ureido)cyclohexyl phenylcarbamate1351642-80-2C19H23N3O3S
- N-(2-(2,3-Dimethylphenyl)-5,5-dioxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)cyclopentanecarboxamide450338-49-5C19H23N3O3S
- 1-(3-(4-Methoxyphenyl)propanoyl)-N-(thiazol-2-yl)piperidine-4-carboxamide1219905-44-8C19H23N3O3S
- Tak-6531358751-06-0C19H23N3O3S
- 4-(1,1-Dioxido-3,4-dihydro-2H-benzo[e][1,2,4]thiadiazin-3-yl)-N-isopentylbenzamide1021221-22-6C19H23N3O3S
- 2-Methyl-N-[4-({2-[2-(thiophen-2-yl)acetamido]ethyl}carbamoyl)phenyl]propanamide1040673-08-2C19H23N3O3S
- Ethyl 1-(2-(2-(phenylamino)thiazol-4-yl)acetyl)piperidine-4-carboxylate1105230-87-2C19H23N3O3S
- N-Cyclopentyl-2-(2-((3-methoxybenzyl)thio)-6-oxo-1,6-dihydropyrimidin-4-yl)acetamide1105211-32-2C19H23N3O3S
- Methyl 2-[2-(4-methylpiperazin-1-yl)acetamido]-4-phenylthiophene-3-carboxylate670269-79-1C19H23N3O3S
- N,N-Bis(2-methoxyethyl)-2-(6-phenylimidazo[2,1-b]thiazol-3-yl)acetamide897458-49-0C19H23N3O3S
- 2-(7-Isopropyl-5-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidin-3-yl)-N-(3-methoxybenzyl)acetamide952973-99-8C19H23N3O3S
- N1-benzyl-N2-(2-morpholino-2-(thiophen-3-yl)ethyl)oxalamide946200-91-5C19H23N3O3S
- 2-(1-(Phenylsulfonyl)piperidin-2-yl)-N-(pyridin-2-ylmethyl)acetamide1021074-02-1C19H23N3O3S
- N-((4-Methylphenyl)sulfonyl)(4-benzylpiperazinyl)formamide349423-54-7C19H23N3O3S
- 4-[(3-Methylpiperidin-1-yl)sulfonyl]-N-(6-methylpyridin-2-yl)benzamide683762-66-5C19H23N3O3S
- N-(5-Methylpyridin-2-yl)-2-(1-(phenylsulfonyl)piperidin-2-yl)acetamide1021040-64-1C19H23N3O3S
- N-(2-Ethyl-6-methylphenyl)-4-(pyrrolidine-1-carbonyl)pyridine-3-sulfonamide1937219-66-3C19H23N3O3S
- 2-(4-Acetyl-1-piperazinyl)-5-(2-isopropoxybenzylidene)-1,3-thiazol-4(5H)-one384358-88-7C19H23N3O3S
- Methyl 5-[4-(diethylamino)phenyl]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate499184-81-5C19H23N3O3S
- N-(4-{[4-(2-Methylphenyl)piperazin-1-yl]sulfonyl}phenyl)acetamide886147-62-2C19H23N3O3S
- 2-Methyl-N-[4-(4-methylsulfonylpiperazin-1-yl)phenyl]benzamide672934-69-9C19H23N3O3S
- 2-(2,5-Dimethoxyphenyl)-7-ethyl-1,2,3,5,6,8-hexahydropyrido[2,3]thieno[2,4-d]pyrimidin-4-one438216-49-0C19H23N3O3S
- 2-((1-(Benzo[d][1,3]dioxol-5-ylmethyl)-1H-imidazol-2-yl)thio)-N-cyclohexylacetamide869346-91-8C19H23N3O3S
- N-(2-(4-Methoxyphenyl)-5-oxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)cyclohexanecarboxamide958587-50-3C19H23N3O3S
- Methyl 6-tert-butyl-2-(pyrazine-2-carbonylamino)-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate329725-07-7C19H23N3O3S
- 3-(Azepan-1-ylsulfonyl)-4-methyl-N-(pyridin-2-yl)benzamide898637-27-9C19H23N3O3S
- 1-(4-(1,1-Dioxidoisothiazolidin-2-yl)phenyl)-3-(3-phenylpropyl)urea1203080-36-7C19H23N3O3S
- Isopropyl 2-{[3-(1-methyl-1H-pyrazol-4-yl)acryloyl]amino}-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate515849-18-0C19H23N3O3S
- N,N-Dimethyl-4-(4-phenylpiperazine-1-carbonyl)benzenesulfonamide446278-23-5C19H23N3O3S
- (E)-2-(4-Acetylpiperazin-1-yl)-5-(4-propoxybenzylidene)thiazol-4(5H)-one371212-03-2C19H23N3O3S
- 3-Methyl-N-{2-[4-(methylsulfonyl)piperazino]phenyl}benzenecarboxamide478260-32-1C19H23N3O3S
- N-(5-Methylisoxazol-3-yl)-1-(3-(phenylthio)propanoyl)piperidine-4-carboxamide1226458-81-6C19H23N3O3S
- 2-Methyl-N-[2-(4-methylsulfonylpiperazin-1-yl)phenyl]benzamide718603-17-9C19H23N3O3S
- N-(5,6-Dimethyl-1-propyl-1H-1,3-benzimidazol-4-yl)-4-methoxybenzenesulfonamide338423-72-6C19H23N3O3S
- 2-[6-(3,4-Dimethoxyphenyl)pyridazin-3-yl]sulfanyl-1-piperidin-1-ylethanone626222-42-2C19H23N3O3S
- 1-{4-[(1,6-Dimethyl-3,4-dihydropyrrolo[1,2-a]pyrazin-2(1H)-yl)sulfonyl]phenyl}pyrrolidin-2-one696616-16-7C19H23N3O3S
- 3-(Cyclohexylmethyl)-8,9-dimethoxy-5-thioxo-5,6-dihydroimidazo[1,2-c]quinazolin-2(3H)-one1008866-58-7C19H23N3O3S
- 1-{2-[(3-Cyano-6-ethyl-5,6,7,8-tetrahydro-2-quinolinyl)sulfanyl]acetyl}-2-pyrrolidinecarboxylic acid1030014-14-2C19H23N3O3S
- 1-Phenyl-3-((1-tosylpyrrolidin-2-yl)methyl)urea896271-09-3C19H23N3O3S
- 2-Cyclopentyl-N-{3-[6-(ethanesulfonyl)pyridazin-3-yl]phenyl}acetamide946272-65-7C19H23N3O3S
- 1-(1-(Methylsulfonyl)-1,2,3,4-tetrahydroquinolin-7-yl)-3-phenethylurea1203240-94-1C19H23N3O3S
- 1-(5-(1,1-Dioxidoisothiazolidin-2-yl)-2-methylphenyl)-3-phenethylurea1203241-43-3C19H23N3O3S
- 2-((1-((5,6,7,8-Tetrahydronaphthalen-2-yl)sulfonyl)piperidin-4-yl)oxy)pyrimidine1421493-53-9C19H23N3O3S
- (E)-2-(4-Acetylpiperazin-1-yl)-5-(4-isopropoxybenzylidene)thiazol-4(5H)-one384802-88-4C19H23N3O3S
- (E)-Ethyl 3-(4-(5-benzylidene-4-oxo-4,5-dihydrothiazol-2-yl)piperazin-1-yl)propanoate375834-32-5C19H23N3O3S
- 3-Thiophenecarboxamide, 2-[[[acetyl(2-phenylethyl)amino]acetyl]amino]-4,5-dimethyl-606109-91-5C19H23N3O3S
- Ethyl 2-{[(2E)-3-(1,5-dimethyl-1H-pyrazol-4-yl)prop-2-enoyl]amino}-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate515849-49-7C19H23N3O3S
- 4-(3,4-Dimethylphenyl)sulfonyl-N-phenylpiperazine-1-carboxamide905527-43-7C19H23N3O3S
- N-(2-Methoxyphenethyl)-2-((2-oxo-1,2,5,6,7,8-hexahydroquinazolin-4-yl)thio)acetamide933203-60-2C19H23N3O3S
- N-Cyclopentyl-2-[[1-(furan-2-ylmethyl)-2-oxo-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl]sulfanyl]acetamide1003253-99-3C19H23N3O3S
- 1-[(2-Butoxy-5-isopropylphenyl)sulfonyl]-1H-1,2,3-benzotriazole940988-46-5C19H23N3O3S
- N1-(2-methoxyphenyl)-N2-(2-(pyrrolidin-1-yl)-2-(thiophen-3-yl)ethyl)oxalamide946303-36-2C19H23N3O3S
- Methyl 3-({[3-methyl-4-(4-methylphenyl)piperazin-1-yl]carbonyl}amino)thiophene-2-carboxylate898139-56-5C19H23N3O3S
- 4-Acetyl-N-((1-(pyridin-2-yl)piperidin-4-yl)methyl)benzenesulfonamide1234894-83-7C19H23N3O3S
- 2-[Acetyl(2-methoxyethyl)amino]-N-(2,3-dihydro-1H-inden-2-yl)-4-methyl-1,3-thiazole-5-carboxamide1224154-91-9C19H23N3O3S
- 3-((1-((5,6,7,8-Tetrahydronaphthalen-2-yl)sulfonyl)piperidin-4-yl)oxy)pyridazine1797862-31-7C19H23N3O3S
- 2-(Cyclopentylthio)-N-(1-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-1H-pyrazol-4-yl)acetamide1788677-60-0C19H23N3O3S
- N-(8-(Methylsulfonyl)-8-azabicyclo[3.2.1]octan-3-yl)-4-(1H-pyrrol-1-yl)benzamide2034385-96-9C19H23N3O3S
- 5-Amino-4-[4-(3,4-dimethoxyphenyl)-1,3-thiazol-2-yl]-1-isobutyl-1,2-dihydro-3H-pyrrol-3-one929869-91-0C19H23N3O3S
- 5-Amino-1-[2-(3,4-dimethoxyphenyl)ethyl]-4-(4,5-dimethyl-1,3-thiazol-2-yl)-1,2-dihydro-3H-pyrrol-3-one951960-39-7C19H23N3O3S
- N-[3-[2-(3,4-Dimethoxyphenyl)ethylcarbamothioylamino]phenyl]acetamide706767-81-9C19H23N3O3S
- N-(2,5-Dimethoxyphenyl)-4-(4-hydroxyphenyl)piperazine-1-carbothioamide708247-07-8C19H23N3O3S
- 2-(1,4-Dioxa-8-azaspiro[4.5]decan-8-yl)-N-[4-(4-methylphenyl)-1,3-thiazol-2-yl]acetamide904750-34-1C19H23N3O3S
- 1-(Furan-2-ylmethyl)-4-(2-oxo-2-piperidin-1-ylethyl)sulfanyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-2-one946374-44-3C19H23N3O3S
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 2-[(2Z)-2-(Cyclooctylidenehydrazinylidene)-4-oxo-3-phenyl-1,3-thiazolidin-5-yl]acetic acid, 1-[[1-(Benzenesulfonyl)piperidin-4-yl]methyl]-3-phenylurea, N-[2-(4-Methylsulfonylpiperazin-1-yl)phenyl]-2-phenylacetamide. 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.