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Molecular formula

C18H21N5O2S2

25 compounds have this formula on CompoundList.

Molar mass
403.52g/mol
Monoisotopic mass
403.1137Da
Atoms
48
Elements
5
Rings plus double bonds
11

The formula C18H21N5O2S2 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 5 nitrogen atoms, 2 oxygen atoms and 2 sulfur 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 × 1853.58%
    12.011 × 18 = 216.198 g/mol
  • H Hydrogen × 215.25%
    1.008 × 21 = 21.168 g/mol
  • N Nitrogen × 517.36%
    14.007 × 5 = 70.035 g/mol
  • O Oxygen × 27.93%
    15.999 × 2 = 31.998 g/mol
  • S Sulfur × 215.89%
    32.06 × 2 = 64.120 g/mol
Look up another formula

Compounds with the formula C18H21N5O2S2

Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.

Showing 1 to 25 of 25 compounds

N-Cyclopentyl-2-[[4-methyl-5-[(2-oxo-1,3-benzothiazol-3-yl)methyl]-1,2,4-triazol-3-yl]sulfanyl]acetamide chemical structure, C18H21N5O2S2, CAS 847400-57-1
N-Cyclopentyl-2-[[4-methyl-5-[(2-oxo-1,3-benzothiazol-3-yl)methyl]-1,2,4-triazol-3-yl]sulfanyl]acetamide
CAS 847400-57-1C18H21N5O2S2
N-[2-[1-(2,5-Dimethylphenyl)tetrazol-5-yl]sulfanylethyl]-4-methylbenzenesulfonamide chemical structure, C18H21N5O2S2, CAS 634168-69-7
N-[2-[1-(2,5-Dimethylphenyl)tetrazol-5-yl]sulfanylethyl]-4-methylbenzenesulfonamide
CAS 634168-69-7C18H21N5O2S2
N-(1-Cyano-1-cyclopropylethyl)-2-((5-((2-ethoxyphenyl)amino)-1,3,4-thiadiazol-2-yl)thio)acetamide chemical structure, C18H21N5O2S2, CAS 863420-67-1
N-(1-Cyano-1-cyclopropylethyl)-2-((5-((2-ethoxyphenyl)amino)-1,3,4-thiadiazol-2-yl)thio)acetamide
CAS 863420-67-1C18H21N5O2S2
3-[(6-Oxo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-11-yl)methyl]-2-sulfanylidene-6,7-dihydro-5H-[1,3,4]thiadiazolo[3,2-a][1,3]diazepin-8-one chemical structure, C18H21N5O2S2, CAS 450346-86-8
3-[(6-Oxo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-11-yl)methyl]-2-sulfanylidene-6,7-dihydro-5H-[1,3,4]thiadiazolo[3,2-a][1,3]diazepin-8-one
CAS 450346-86-8C18H21N5O2S2
2-[6-(tert-Butylsulfanyl)-3-oxo-2H,3H-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]-N-[3-(methylsulfanyl)phenyl]acetamide chemical structure, C18H21N5O2S2, CAS 1040653-61-9
2-[6-(tert-Butylsulfanyl)-3-oxo-2H,3H-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]-N-[3-(methylsulfanyl)phenyl]acetamide
CAS 1040653-61-9C18H21N5O2S2
2-({5-[1-(4-Ethylphenoxy)ethyl]-4-methyl-4H-1,2,4-triazol-3-yl}sulfanyl)-N-(1,3-thiazol-2-yl)acetamide chemical structure, C18H21N5O2S2, CAS 665016-40-0
2-({5-[1-(4-Ethylphenoxy)ethyl]-4-methyl-4H-1,2,4-triazol-3-yl}sulfanyl)-N-(1,3-thiazol-2-yl)acetamide
CAS 665016-40-0C18H21N5O2S2
N-(5-tert-Butyl-1,3,4-thiadiazol-2-yl)-4-oxo-7,8,9,10-tetrahydro-4H,6H-cyclohepta[4,5][1,3]thiazolo[3,2-a]pyrimidine-3-carboxamide chemical structure, C18H21N5O2S2, CAS 1351701-02-4
N-(5-tert-Butyl-1,3,4-thiadiazol-2-yl)-4-oxo-7,8,9,10-tetrahydro-4H,6H-cyclohepta[4,5][1,3]thiazolo[3,2-a]pyrimidine-3-carboxamide
CAS 1351701-02-4C18H21N5O2S2
N-(1-Cyanocyclohexyl)-2-[[5-(2-methoxyanilino)-1,3,4-thiadiazol-2-yl]sulfanyl]acetamide chemical structure, C18H21N5O2S2, CAS 863415-28-5
N-(1-Cyanocyclohexyl)-2-[[5-(2-methoxyanilino)-1,3,4-thiadiazol-2-yl]sulfanyl]acetamide
CAS 863415-28-5C18H21N5O2S2
N-[(2E)-5-(4-Methoxybenzyl)-1,3,4-thiadiazol-2(3H)-ylidene]-2-[(2-methylpropyl)amino]-1,3-thiazole-4-carboxamide chemical structure, C18H21N5O2S2, CAS 1219572-63-0
N-[(2E)-5-(4-Methoxybenzyl)-1,3,4-thiadiazol-2(3H)-ylidene]-2-[(2-methylpropyl)amino]-1,3-thiazole-4-carboxamide
CAS 1219572-63-0C18H21N5O2S2
4-Butyl-2-(1H-pyrrol-1-yl)-N-[(2Z)-5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]-1,3-thiazole-5-carboxamide chemical structure, C18H21N5O2S2, CAS 1246072-25-2
4-Butyl-2-(1H-pyrrol-1-yl)-N-[(2Z)-5-(tetrahydrofuran-2-yl)-1,3,4-thiadiazol-2(3H)-ylidene]-1,3-thiazole-5-carboxamide
CAS 1246072-25-2C18H21N5O2S2
5-(((4,6-Dimethylpyrimidin-2-yl)thio)methyl)-N-(5-isobutyl-1,3,4-thiadiazol-2-yl)furan-2-carboxamide chemical structure, C18H21N5O2S2, CAS 1401561-28-1
5-(((4,6-Dimethylpyrimidin-2-yl)thio)methyl)-N-(5-isobutyl-1,3,4-thiadiazol-2-yl)furan-2-carboxamide
CAS 1401561-28-1C18H21N5O2S2
N-(1-Cyanocyclopentyl)-2-((5-((2-ethoxyphenyl)amino)-1,3,4-thiadiazol-2-yl)thio)acetamide chemical structure, C18H21N5O2S2, CAS 863417-92-9
N-(1-Cyanocyclopentyl)-2-((5-((2-ethoxyphenyl)amino)-1,3,4-thiadiazol-2-yl)thio)acetamide
CAS 863417-92-9C18H21N5O2S2
N-(1-Cyanocyclohexyl)-2-({5-[(3-methoxyphenyl)amino]-1,3,4-thiadiazol-2-yl}sulfanyl)acetamide chemical structure, C18H21N5O2S2, CAS 863411-56-7
N-(1-Cyanocyclohexyl)-2-({5-[(3-methoxyphenyl)amino]-1,3,4-thiadiazol-2-yl}sulfanyl)acetamide
CAS 863411-56-7C18H21N5O2S2
3-Ethoxy-1-ethyl-N-{5-[(2-phenylethyl)sulfanyl]-1,3,4-thiadiazol-2-yl}-1H-pyrazole-4-carboxamide chemical structure, C18H21N5O2S2, CAS 1207056-02-7
3-Ethoxy-1-ethyl-N-{5-[(2-phenylethyl)sulfanyl]-1,3,4-thiadiazol-2-yl}-1H-pyrazole-4-carboxamide
CAS 1207056-02-7C18H21N5O2S2
2-(4-Oxo-2-(pyrrolidin-1-yl)-7-(thiophen-2-yl)thiazolo[4,5-d]pyridazin-5(4H)-yl)-N-propylacetamide chemical structure, C18H21N5O2S2, CAS 1105218-97-0
2-(4-Oxo-2-(pyrrolidin-1-yl)-7-(thiophen-2-yl)thiazolo[4,5-d]pyridazin-5(4H)-yl)-N-propylacetamide
CAS 1105218-97-0C18H21N5O2S2
2-((5-(4-(Cyclopropanecarbonyl)piperazin-1-yl)-1,3,4-thiadiazol-2-yl)thio)-N-phenylacetamide chemical structure, C18H21N5O2S2, CAS 1105225-14-6
2-((5-(4-(Cyclopropanecarbonyl)piperazin-1-yl)-1,3,4-thiadiazol-2-yl)thio)-N-phenylacetamide
CAS 1105225-14-6C18H21N5O2S2
2-(8-(Cyclohexylthio)-3-oxo-[1,2,4]triazolo[4,3-a]pyrazin-2(3H)-yl)-N-(thiophen-2-ylmethyl)acetamide chemical structure, C18H21N5O2S2, CAS 1251634-98-6
2-(8-(Cyclohexylthio)-3-oxo-[1,2,4]triazolo[4,3-a]pyrazin-2(3H)-yl)-N-(thiophen-2-ylmethyl)acetamide
CAS 1251634-98-6C18H21N5O2S2
3-((4-Methyl-5-((2-oxo-2-(piperidin-1-yl)ethyl)thio)-4H-1,2,4-triazol-3-yl)methyl)benzo[d]thiazol-2(3H)-one chemical structure, C18H21N5O2S2, CAS 847400-09-3
3-((4-Methyl-5-((2-oxo-2-(piperidin-1-yl)ethyl)thio)-4H-1,2,4-triazol-3-yl)methyl)benzo[d]thiazol-2(3H)-one
CAS 847400-09-3C18H21N5O2S2
N-Isopropyl-2-(4-oxo-2-(pyrrolidin-1-yl)-7-(thiophen-2-yl)thiazolo[4,5-d]pyridazin-5(4H)-yl)acetamide chemical structure, C18H21N5O2S2, CAS 1105233-51-9
N-Isopropyl-2-(4-oxo-2-(pyrrolidin-1-yl)-7-(thiophen-2-yl)thiazolo[4,5-d]pyridazin-5(4H)-yl)acetamide
CAS 1105233-51-9C18H21N5O2S2
2-((1-(2-Methoxyethyl)-5-(p-tolyl)-1H-imidazol-2-yl)thio)-N-(5-methyl-1,3,4-thiadiazol-2-yl)acetamide chemical structure, C18H21N5O2S2, CAS 1207004-92-9
2-((1-(2-Methoxyethyl)-5-(p-tolyl)-1H-imidazol-2-yl)thio)-N-(5-methyl-1,3,4-thiadiazol-2-yl)acetamide
CAS 1207004-92-9C18H21N5O2S2
N-((1-(2-Methylpyridin-4-yl)piperidin-4-yl)methyl)benzo[c][1,2,5]thiadiazole-4-sulfonamide chemical structure, C18H21N5O2S2, CAS 2034468-53-4
N-((1-(2-Methylpyridin-4-yl)piperidin-4-yl)methyl)benzo[c][1,2,5]thiadiazole-4-sulfonamide
CAS 2034468-53-4C18H21N5O2S2
N-(2-(2,3-Dihydroimidazo[2,1-b]thiazol-6-yl)phenyl)-1-ethyl-3,5-dimethyl-1H-pyrazole-4-sulfonamide chemical structure, C18H21N5O2S2, CAS 2034487-03-9
N-(2-(2,3-Dihydroimidazo[2,1-b]thiazol-6-yl)phenyl)-1-ethyl-3,5-dimethyl-1H-pyrazole-4-sulfonamide
CAS 2034487-03-9C18H21N5O2S2
3-{[1-(3-Cyclopropyl-1,2,4-thiadiazol-5-yl)piperidin-4-yl](methyl)amino}-1??,2-benzothiazole-1,1-dione chemical structure, C18H21N5O2S2, CAS 2549022-93-5
3-{[1-(3-Cyclopropyl-1,2,4-thiadiazol-5-yl)piperidin-4-yl](methyl)amino}-1??,2-benzothiazole-1,1-dione
CAS 2549022-93-5C18H21N5O2S2
6-Methyl-3-{2-oxo-2-[5-(1,3-thiazol-2-yl)-octahydropyrrolo[3,4-c]pyrrol-2-yl]ethyl}-2H,3H,5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one chemical structure, C18H21N5O2S2, CAS 2549044-77-9
6-Methyl-3-{2-oxo-2-[5-(1,3-thiazol-2-yl)-octahydropyrrolo[3,4-c]pyrrol-2-yl]ethyl}-2H,3H,5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one
CAS 2549044-77-9C18H21N5O2S2

Frequently asked questions

What is the molar mass of C18H21N5O2S2?

The molar mass of C18H21N5O2S2 is 403.52 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 5 nitrogen atoms, 2 oxygen atoms and 2 sulfur atoms. The monoisotopic mass is 403.1137 Da.

How many compounds have the formula C18H21N5O2S2?

CompoundList lists 25 compounds with the molecular formula C18H21N5O2S2, including N-Cyclopentyl-2-[[4-methyl-5-[(2-oxo-1,3-benzothiazol-3-yl)methyl]-1,2,4-triazol-3-yl]sulfanyl]acetamide, N-[2-[1-(2,5-Dimethylphenyl)tetrazol-5-yl]sulfanylethyl]-4-methylbenzenesulfonamide, N-(1-Cyano-1-cyclopropylethyl)-2-((5-((2-ethoxyphenyl)amino)-1,3,4-thiadiazol-2-yl)thio)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 C18H21N5O2S2?

C18H21N5O2S2 has a degree of unsaturation of 11. 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.