Molecular formula
C19H19N5O4S
75 compounds have this formula on CompoundList.
- Molar mass
- 413.45g/mol
- Monoisotopic mass
- 413.1158Da
- Atoms
- 48
- Elements
- 5
- Rings plus double bonds
- 13
The formula C19H19N5O4S describes a molecule made of 19 carbon atoms, 19 hydrogen atoms, 5 nitrogen atoms, 4 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 × 1955.20%12.011 × 19 = 228.209 g/mol
- H Hydrogen × 194.63%1.008 × 19 = 19.152 g/mol
- N Nitrogen × 516.94%14.007 × 5 = 70.035 g/mol
- O Oxygen × 415.48%15.999 × 4 = 63.996 g/mol
- S Sulfur × 17.75%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C19H19N5O4S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 75 of 75 compounds
5-Pyrimidinecarboxamide, N-hydroxy-2-(4-(2-naphthalenylsulfonyl)-1-piperazinyl)-
CAS 604769-01-9C19H19N5O4S
beta-Alanine, N-ethyl-N-(4-((5-nitro-2,1-benzisothiazol-3-yl)azo)phenyl)-, methyl ester
CAS 52239-04-0C19H19N5O4S
![2-((3-(2-Methoxyethyl)-4-oxo-4,5-dihydro-3H-pyrimido[5,4-b]indol-2-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide chemical structure, C19H19N5O4S, CAS 887217-07-4](/s/OPUUJADUGUVCGX-UHFFFAOYSA-N.svg)
2-((3-(2-Methoxyethyl)-4-oxo-4,5-dihydro-3H-pyrimido[5,4-b]indol-2-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide
CAS 887217-07-4C19H19N5O4S
![2-{[4-Amino-5-(2-methoxyphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}-N-(2,3-dihydro-1,4-benzodioxin-6-yl)acetamide chemical structure, C19H19N5O4S, CAS 577985-00-3](/s/JHTQSWQGXMNWCC-UHFFFAOYSA-N.svg)
2-{[4-Amino-5-(2-methoxyphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}-N-(2,3-dihydro-1,4-benzodioxin-6-yl)acetamide
CAS 577985-00-3C19H19N5O4S
![[2-((E)-{[3-(4-Ethoxyphenyl)-5-sulfanyl-4H-1,2,4-triazol-4-yl]hydrazono}methyl)phenoxy]acetic acid chemical structure, C19H19N5O4S, CAS 624725-65-1](/s/NIDBBFMWVLWUJE-RGVLZGJSSA-N.svg)
[2-((E)-{[3-(4-Ethoxyphenyl)-5-sulfanyl-4H-1,2,4-triazol-4-yl]hydrazono}methyl)phenoxy]acetic acid
CAS 624725-65-1C19H19N5O4S
![2-[[4-Methyl-5-[(2-methylphenoxy)methyl]-1,2,4-triazol-3-yl]sulfanyl]-N-(4-nitrophenyl)acetamide chemical structure, C19H19N5O4S, CAS 483329-87-9](/s/NQOPLJSOTYEODX-UHFFFAOYSA-N.svg)
2-[[4-Methyl-5-[(2-methylphenoxy)methyl]-1,2,4-triazol-3-yl]sulfanyl]-N-(4-nitrophenyl)acetamide
CAS 483329-87-9C19H19N5O4S
![N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-{[4-methyl-5-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetamide chemical structure, C19H19N5O4S, CAS 1040643-81-9](/s/CTSMNTKYWPCZJF-UHFFFAOYSA-N.svg)
N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-{[4-methyl-5-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetamide
CAS 1040643-81-9C19H19N5O4S
![Methyl 4-(2-{[4-methyl-5-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetamido)benzoate chemical structure, C19H19N5O4S, CAS 1040644-21-0](/s/OJEBYMLLKWVPTN-UHFFFAOYSA-N.svg)
Methyl 4-(2-{[4-methyl-5-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetamido)benzoate
CAS 1040644-21-0C19H19N5O4S
![N-(Benzo[d][1,3]dioxol-5-ylmethyl)-2-((4-methyl-5-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide chemical structure, C19H19N5O4S, CAS 1040644-29-8](/s/GPORZSRLPOBYHM-UHFFFAOYSA-N.svg)
N-(Benzo[d][1,3]dioxol-5-ylmethyl)-2-((4-methyl-5-(1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide
CAS 1040644-29-8C19H19N5O4S
![N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-((4-methyl-5-(1-methyl-2-oxo-1,2-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide chemical structure, C19H19N5O4S, CAS 1105207-22-4](/s/DQMMCDYQNKKKAN-UHFFFAOYSA-N.svg)
N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-((4-methyl-5-(1-methyl-2-oxo-1,2-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide
CAS 1105207-22-4C19H19N5O4S
![N-(Benzo[d][1,3]dioxol-5-yl)-2-((4-ethyl-5-(1-methyl-2-oxo-1,2-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide chemical structure, C19H19N5O4S, CAS 1105207-63-3](/s/MITXCCAUKNHRFB-UHFFFAOYSA-N.svg)
N-(Benzo[d][1,3]dioxol-5-yl)-2-((4-ethyl-5-(1-methyl-2-oxo-1,2-dihydropyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide
CAS 1105207-63-3C19H19N5O4S
![N-(Benzo[d][1,3]dioxol-5-yl)-2-((5-(1-ethyl-2-oxo-1,2-dihydropyridin-3-yl)-4-methyl-4H-1,2,4-triazol-3-yl)thio)acetamide chemical structure, C19H19N5O4S, CAS 1105208-12-5](/s/JMIDDAXHQNYDGF-UHFFFAOYSA-N.svg)
N-(Benzo[d][1,3]dioxol-5-yl)-2-((5-(1-ethyl-2-oxo-1,2-dihydropyridin-3-yl)-4-methyl-4H-1,2,4-triazol-3-yl)thio)acetamide
CAS 1105208-12-5C19H19N5O4S
![1-(1,1-Dioxidotetrahydrothiophen-3-yl)-5-(2-(indolin-1-yl)-2-oxoethyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one chemical structure, C19H19N5O4S, CAS 1040646-34-1](/s/PNULYOARXLUDBY-UHFFFAOYSA-N.svg)
1-(1,1-Dioxidotetrahydrothiophen-3-yl)-5-(2-(indolin-1-yl)-2-oxoethyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one
CAS 1040646-34-1C19H19N5O4S
N-(4-Amino-2-((2-((3,5-dimethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide
CAS 868226-04-4C19H19N5O4S
4-(6-Oxo-3-(pyridin-3-yl)pyridazin-1(6H)-yl)-N-(4-sulfamoylphenyl)butanamide
CAS 1040647-71-9C19H19N5O4S
4-(2-((1-(4-Ethoxyphenyl)-1H-tetrazol-5-yl)thio)propanamido)benzoic acid
CAS 887348-75-6C19H19N5O4S
![Furan-2-yl(4-(furan-2-yl(6-hydroxy-2-methylthiazolo[3,2-b][1,2,4]triazol-5-yl)methyl)piperazin-1-yl)methanone chemical structure, C19H19N5O4S, CAS 851970-11-1](/s/KWUALKPOAHNFNY-UHFFFAOYSA-N.svg)
Furan-2-yl(4-(furan-2-yl(6-hydroxy-2-methylthiazolo[3,2-b][1,2,4]triazol-5-yl)methyl)piperazin-1-yl)methanone
CAS 851970-11-1C19H19N5O4S
![2-({8,9-Dimethoxy-2-methyl-[1,2,4]triazolo[1,5-c]quinazolin-5-yl}sulfanyl)-N-[(furan-2-yl)methyl]acetamide chemical structure, C19H19N5O4S, CAS 902593-29-7](/s/UDZXVXDMMZPBAF-UHFFFAOYSA-N.svg)
2-({8,9-Dimethoxy-2-methyl-[1,2,4]triazolo[1,5-c]quinazolin-5-yl}sulfanyl)-N-[(furan-2-yl)methyl]acetamide
CAS 902593-29-7C19H19N5O4S
2-(2-((1-(4-Ethoxyphenyl)-1H-tetrazol-5-yl)thio)acetamido)-3-methylbenzoic acid
CAS 878702-70-6C19H19N5O4S
![Methyl 4-[[2-[[4-amino-5-(2-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetyl]amino]benzoate chemical structure, C19H19N5O4S, CAS 587008-81-9](/s/BJVSESLLPXZRSY-UHFFFAOYSA-N.svg)
Methyl 4-[[2-[[4-amino-5-(2-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetyl]amino]benzoate
CAS 587008-81-9C19H19N5O4S
![Methyl 4-[[2-[[4-amino-5-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetyl]amino]benzoate chemical structure, C19H19N5O4S, CAS 784186-87-4](/s/RFQFIBHXNGZLOE-UHFFFAOYSA-N.svg)
Methyl 4-[[2-[[4-amino-5-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetyl]amino]benzoate
CAS 784186-87-4C19H19N5O4S
![N-(2-Hydroxyethyl)-4-methoxy-3-(6-methyl-[1,2,4]triazolo[3,4-a]phthalazin-3-yl)benzenesulfonamide chemical structure, C19H19N5O4S, CAS 701953-75-5](/s/PIFZQEHWIZAQNF-UHFFFAOYSA-N.svg)
N-(2-Hydroxyethyl)-4-methoxy-3-(6-methyl-[1,2,4]triazolo[3,4-a]phthalazin-3-yl)benzenesulfonamide
CAS 701953-75-5C19H19N5O4S
![N-(4-Acetylphenyl)-2-((2,6,8-trimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)acetamide chemical structure, C19H19N5O4S, CAS 852168-35-5](/s/PIIWNBFCNLYDTB-UHFFFAOYSA-N.svg)
N-(4-Acetylphenyl)-2-((2,6,8-trimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl)thio)acetamide
CAS 852168-35-5C19H19N5O4S
N-(4-Amino-6-oxo-2-((2-oxo-2-(phenethylamino)ethyl)thio)-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide
CAS 868226-46-4C19H19N5O4S
- N-(4-Amino-2-((2-((2,3-dimethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide868226-00-0C19H19N5O4S
- N-(4-Amino-2-((2-((2,4-dimethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide868226-02-2C19H19N5O4S
- N-[4-[5-[(2-Methoxy-5-nitrophenyl)methylsulfanyl]-4-methyl-1,2,4-triazol-3-yl]phenyl]acetamide693236-31-6C19H19N5O4S
- Methyl 2-[[2-[[4-amino-5-(4-methoxyphenyl)-1,2,4-triazol-3-yl]sulfanyl]acetyl]amino]benzoate784172-25-4C19H19N5O4S
- 6-Methyl-N-{2-methyl-4-[(E)-(2-methylphenyl)diazenyl]phenyl}-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-sulfonamide479061-40-0C19H19N5O4S
- 2-[[3-[(4-Nitropyrazol-1-yl)methyl]benzoyl]amino]-5-propan-2-ylthiophene-3-carboxamide512823-24-4C19H19N5O4S
- 5-Cyclopentylsulfanyl-1,3-dimethyl-7-(4-nitrophenyl)pyrimido[4,5-d]pyrimidine-2,4-dione863003-52-5C19H19N5O4S
- 5-Cyclopentylsulfanyl-1,3-dimethyl-7-(3-nitrophenyl)pyrimido[4,5-d]pyrimidine-2,4-dione872854-64-3C19H19N5O4S
- N-(3-Acetamidophenyl)-2-(1,3-dimethyl-2,4-dioxopyrido[2,3-d]pyrimidin-5-yl)sulfanylacetamide900005-69-8C19H19N5O4S
- 1-(Furan-2-yl(2-(furan-2-yl)-6-hydroxythiazolo[3,2-b][1,2,4]triazol-5-yl)methyl)piperidine-4-carboxamide887223-03-2C19H19N5O4S
- 1-(2-(5-((2-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-oxoethyl)thio)-1,3,4-oxadiazol-2-yl)ethyl)pyrimidine-2,4(1H,3H)-dione942676-94-0C19H19N5O4S
- N-(2-(Benzo[c][1,2,5]oxadiazole-4-sulfonamido)ethyl)-3-(1H-indol-3-yl)propanamide1010879-39-6C19H19N5O4S
- N-(1,3-Dihydro-2H-benzimidazol-2-ylidene)-3-{[(1,1-dioxidotetrahydrothiophen-3-yl)carbamoyl]amino}benzamide1144444-96-1C19H19N5O4S
- N-(1,3-Benzodioxol-5-yl)-2-[7-oxo-2-(piperidin-1-yl)[1,3]thiazolo[4,5-d]pyrimidin-6(7H)-yl]acetamide1223988-47-3C19H19N5O4S
- 2-[3-(4-Methoxyphenyl)-6-oxopyridazin-1(6H)-yl]-N-[(2E)-5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]acetamide1246046-01-4C19H19N5O4S
- N-[(2E)-5-Cyclopropyl-1,3,4-thiadiazol-2(3H)-ylidene]-2-[3-(3,4-dimethoxyphenyl)-6-oxopyridazin-1(6H)-yl]acetamide1282126-32-2C19H19N5O4S
- N-(2-(3-(1H-Indol-1-yl)-6-oxopyridazin-1(6H)-yl)ethyl)-3,5-dimethylisoxazole-4-sulfonamide1448130-22-0C19H19N5O4S
- 2-[[5-(4-Methoxyphenyl)-4-methyl-1,2,4-triazol-3-yl]sulfanyl]-N-(4-methyl-3-nitrophenyl)acetamide482660-14-0C19H19N5O4S
- N-(3-Methoxyphenyl)-2-[4-methyl-5-[(4-nitrophenyl)methylsulfanyl]-1,2,4-triazol-3-yl]acetamide713491-17-9C19H19N5O4S
- N-(4-Ethoxyphenyl)-2-[[4-methyl-5-(4-nitrophenyl)-1,2,4-triazol-3-yl]sulfanyl]acetamide693230-09-0C19H19N5O4S
- 1-(2,5-Dimethoxyphenyl)-3-[[2-(1-oxophthalazin-2-yl)acetyl]amino]thiourea696631-57-9C19H19N5O4S
- 2-{[4-Amino-5-(4-methoxyphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}-N-(2,3-dihydro-1,4-benzodioxin-6-yl)acetamide578701-86-7C19H19N5O4S
- N-(4-Acetamidophenyl)-2-(1,3-dimethyl-2,4-dioxopyrido[2,3-d]pyrimidin-5-yl)sulfanylacetamide899732-24-2C19H19N5O4S
- 4-(2-((1,3,6-Trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidin-5-yl)thio)acetamido)benzamide899940-19-3C19H19N5O4S
- 2-(2,5-Dioxopyrrolidin-1-yl)-N-(1-(4-ethoxybenzo[d]thiazol-2-yl)-3-methyl-1H-pyrazol-5-yl)acetamide1172804-94-2C19H19N5O4S
- N-[4-(1,1-Dioxido-1,2-thiazolidin-2-yl)phenyl]-3-[3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl]propanamide1574308-44-3C19H19N5O4S
- N-(4-((4-(Pyrazin-2-yl)piperazin-1-yl)sulfonyl)phenyl)furan-2-carboxamide1021077-11-1C19H19N5O4S
- 1-[3-Methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carbonyl]piperidine-4-carboxamide852135-98-9C19H19N5O4S
- N-(4-Carbamoylphenyl)-3-methyl-5-(N-(p-tolyl)sulfamoyl)-1H-pyrazole-4-carboxamide1239955-00-0C19H19N5O4S
- N,N-Dimethyl-4-(3-(3-(pyridin-4-yl)-1,2,4-oxadiazol-5-yl)azetidine-1-carbonyl)benzenesulfonamide1251558-67-4C19H19N5O4S
- N-(Benzo[d][1,3]dioxol-5-ylmethyl)-2-(7-oxo-2-(pyrrolidin-1-yl)thiazolo[4,5-d]pyrimidin-6(7H)-yl)acetamide1223912-14-8C19H19N5O4S
- 2-[3-(3-Methoxyphenyl)-6-oxopyridazin-1(6H)-yl]-N-[(2E)-5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]acetamide1232817-30-9C19H19N5O4S
- Jak3-IN-121430095-86-5C19H19N5O4S
- N-(4-Amino-6-oxo-2-((pyridin-3-ylmethyl)thio)-1,6-dihydropyrimidin-5-yl)-3,4-dimethoxybenzamide868228-26-6C19H19N5O4S
- N-(4-Amino-2-((2-((4-ethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide868226-08-8C19H19N5O4S
- N-(4-Amino-2-((2-((2,5-dimethylphenyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)furan-2-carboxamide868226-01-1C19H19N5O4S
- N-(4-Amino-2-((2-((furan-2-ylmethyl)amino)-2-oxoethyl)thio)-6-oxo-1,6-dihydropyrimidin-5-yl)-4-methylbenzamide872597-55-2C19H19N5O4S
- 2-[[4-Methyl-5-(1-phenoxyethyl)-1,2,4-triazol-3-yl]sulfanyl]-N-(4-nitrophenyl)acetamide694484-90-7C19H19N5O4S
- 2-[[2-[1-(2-Ethoxyphenyl)tetrazol-5-yl]sulfanylacetyl]amino]-5-methylbenzoic acid941956-38-3C19H19N5O4S
- Methyl 4-(2-(7-oxo-2-(pyrrolidin-1-yl)thiazolo[4,5-d]pyrimidin-6(7H)-yl)acetamido)benzoate1223989-47-6C19H19N5O4S
- N-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2-(7-oxo-2-(pyrrolidin-1-yl)thiazolo[4,5-d]pyrimidin-6(7H)-yl)acetamide1223771-07-0C19H19N5O4S
- Methyl 2-(2-(7-oxo-2-(pyrrolidin-1-yl)thiazolo[4,5-d]pyrimidin-6(7H)-yl)acetamido)benzoate1223937-60-7C19H19N5O4S
- N-(3-Acetylphenyl)-2-(2-morpholino-7-oxothiazolo[4,5-d]pyrimidin-6(7H)-yl)acetamide1223959-46-3C19H19N5O4S
- Methyl 4-[({[4-amino-5-(3-methoxyphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetyl)amino]benzoate578761-16-7C19H19N5O4S
- 2-[[4-Methyl-5-[(2-methylphenoxy)methyl]-1,2,4-triazol-3-yl]sulfanyl]-N-(3-nitrophenyl)acetamide693232-84-7C19H19N5O4S
- 4-Methoxy-N-[[4-methyl-5-[(4-nitrophenyl)methylsulfanyl]-1,2,4-triazol-3-yl]methyl]benzamide767326-27-2C19H19N5O4S
- N-(4-Amino-6-oxo-2-((pyridin-2-ylmethyl)thio)-1,6-dihydropyrimidin-5-yl)-3,4-dimethoxybenzamide888422-80-8C19H19N5O4S
- (Z)-2-Cyano-3-[4-(1-methylimidazol-2-yl)sulfanyl-3-nitrophenyl]-N-(oxolan-2-ylmethyl)prop-2-enamide852684-99-2C19H19N5O4S
- 3-[(2,4-Dinitrophenyl)sulfanyl]-5-pentyl-4-phenyl-4H-1,2,4-triazole54220-23-4C19H19N5O4S
- E7449 mesylate1140965-47-4C19H19N5O4S
- 2-Cyano-3-{4-[(1-methyl-1H-imidazol-2-yl)sulfanyl]-3-nitrophenyl}-N-[(oxolan-2-yl)methyl]prop-2-enamideC19H19N5O4S
Frequently asked questions
What is the molar mass of C19H19N5O4S?
The molar mass of C19H19N5O4S is 413.45 g/mol, calculated from standard atomic weights for 19 carbon atoms, 19 hydrogen atoms, 5 nitrogen atoms, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 413.1158 Da.
How many compounds have the formula C19H19N5O4S?
CompoundList lists 75 compounds with the molecular formula C19H19N5O4S, including 5-Pyrimidinecarboxamide, N-hydroxy-2-(4-(2-naphthalenylsulfonyl)-1-piperazinyl)-, beta-Alanine, N-ethyl-N-(4-((5-nitro-2,1-benzisothiazol-3-yl)azo)phenyl)-, methyl ester, 2-((3-(2-Methoxyethyl)-4-oxo-4,5-dihydro-3H-pyrimido[5,4-b]indol-2-yl)thio)-N-(5-methylisoxazol-3-yl)acetamide. 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 C19H19N5O4S?
C19H19N5O4S 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.