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Molecular formula

C21H18N4O5S

40 compounds have this formula on CompoundList.

Molar mass
438.46g/mol
Monoisotopic mass
438.0998Da
Atoms
49
Elements
5
Rings plus double bonds
15

The formula C21H18N4O5S describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms, 5 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 × 2157.53%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 184.14%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 412.78%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 518.24%
    15.999 × 5 = 79.995 g/mol
  • S Sulfur × 17.31%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C21H18N4O5S

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

Showing 1 to 40 of 40 compounds

N-[4-({[4-(1-Oxo-3,4-dihydro-1H-isochromen-3-yl)-2-pyrimidinyl]amino}sulfonyl)phenyl]acetamide chemical structure, C21H18N4O5S, CAS 523992-24-7
N-[4-({[4-(1-Oxo-3,4-dihydro-1H-isochromen-3-yl)-2-pyrimidinyl]amino}sulfonyl)phenyl]acetamide
CAS 523992-24-7C21H18N4O5S
4-[Ethyl(phenyl)sulfamoyl]-N-[5-(furan-2-yl)-1,3,4-oxadiazol-2-yl]benzamide chemical structure, C21H18N4O5S, CAS 851095-60-8
4-[Ethyl(phenyl)sulfamoyl]-N-[5-(furan-2-yl)-1,3,4-oxadiazol-2-yl]benzamide
CAS 851095-60-8C21H18N4O5S
1-(3-(1H-Imidazol-1-yl)propyl)-3-hydroxy-5-(3-nitrophenyl)-4-(thiophene-2-carbonyl)-1H-pyrrol-2(5H)-one chemical structure, C21H18N4O5S, CAS 380887-92-3
1-(3-(1H-Imidazol-1-yl)propyl)-3-hydroxy-5-(3-nitrophenyl)-4-(thiophene-2-carbonyl)-1H-pyrrol-2(5H)-one
CAS 380887-92-3C21H18N4O5S
Methanesulfonanilide, 3'-methoxy-4'-((3-nitro-9-acridinyl)amino)- chemical structure, C21H18N4O5S, CAS 64895-35-8
Methanesulfonanilide, 3'-methoxy-4'-((3-nitro-9-acridinyl)amino)-
CAS 64895-35-8C21H18N4O5S
Methanesulfonanilide, 3'-methoxy-4'-((4-nitro-9-acridinyl)amino)- chemical structure, C21H18N4O5S, CAS 76708-70-8
Methanesulfonanilide, 3'-methoxy-4'-((4-nitro-9-acridinyl)amino)-
CAS 76708-70-8C21H18N4O5S
2-{2,4-Dioxo-1-[(phenylcarbamoyl)methyl]-1H,2H,3H,4H-thieno[3,2-d]pyrimidin-3-yl}-N-[(furan-2-yl)methyl]acetamide chemical structure, C21H18N4O5S, CAS 912887-57-1
2-{2,4-Dioxo-1-[(phenylcarbamoyl)methyl]-1H,2H,3H,4H-thieno[3,2-d]pyrimidin-3-yl}-N-[(furan-2-yl)methyl]acetamide
CAS 912887-57-1C21H18N4O5S
4-[Benzyl(methyl)sulfamoyl]-N-[5-(furan-2-yl)-1,3,4-oxadiazol-2-yl]benzamide chemical structure, C21H18N4O5S, CAS 851095-56-2
4-[Benzyl(methyl)sulfamoyl]-N-[5-(furan-2-yl)-1,3,4-oxadiazol-2-yl]benzamide
CAS 851095-56-2C21H18N4O5S
6-(((3-(4-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)thio)-7-methyl-[1,3]dioxolo[4,5-g]quinazolin-8(7H)-one chemical structure, C21H18N4O5S, CAS 1030110-29-2
6-(((3-(4-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)thio)-7-methyl-[1,3]dioxolo[4,5-g]quinazolin-8(7H)-one
CAS 1030110-29-2C21H18N4O5S
Methyl 3-cyano-2-(3-(2,5-dioxopyrrolidin-1-yl)benzamido)-4,5-dihydrothieno[2,3-c]pyridine-6(7H)-carboxylate chemical structure, C21H18N4O5S, CAS 886955-33-5
Methyl 3-cyano-2-(3-(2,5-dioxopyrrolidin-1-yl)benzamido)-4,5-dihydrothieno[2,3-c]pyridine-6(7H)-carboxylate
CAS 886955-33-5C21H18N4O5S
N-(3-(6-Methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)-2,3-dihydrobenzo[b][1,4]dioxine-6-sulfonamide chemical structure, C21H18N4O5S, CAS 946323-73-5
N-(3-(6-Methoxyimidazo[1,2-b]pyridazin-2-yl)phenyl)-2,3-dihydrobenzo[b][1,4]dioxine-6-sulfonamide
CAS 946323-73-5C21H18N4O5S
[2-(Benzotriazol-2-yl)-4-methylphenyl] 4-(methoxycarbonylamino)benzenesulfonate chemical structure, C21H18N4O5S, CAS 312272-90-5
[2-(Benzotriazol-2-yl)-4-methylphenyl] 4-(methoxycarbonylamino)benzenesulfonate
CAS 312272-90-5C21H18N4O5S
N-[5-[(3,4-Dimethoxyphenyl)methyl]-1,3,4-thiadiazol-2-yl]-2-(1,3-dioxoisoindol-2-yl)acetamide chemical structure, C21H18N4O5S, CAS 600149-64-2
N-[5-[(3,4-Dimethoxyphenyl)methyl]-1,3,4-thiadiazol-2-yl]-2-(1,3-dioxoisoindol-2-yl)acetamide
CAS 600149-64-2C21H18N4O5S
2-{[3-Cyano-4-(3-nitrophenyl)-6-oxo-1,4,5,6-tetrahydropyridin-2-yl]sulfanyl}-N-(3-methoxyphenyl)acetamide chemical structure, C21H18N4O5S, CAS 683794-00-5
2-{[3-Cyano-4-(3-nitrophenyl)-6-oxo-1,4,5,6-tetrahydropyridin-2-yl]sulfanyl}-N-(3-methoxyphenyl)acetamide
CAS 683794-00-5C21H18N4O5S
7-(2-Methoxyethyl)-6-{[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]sulfanyl}-2H,7H,8H-[1,3]dioxolo[4,5-g]quinazolin-8-one chemical structure, C21H18N4O5S, CAS 1112013-57-6
7-(2-Methoxyethyl)-6-{[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]sulfanyl}-2H,7H,8H-[1,3]dioxolo[4,5-g]quinazolin-8-one
CAS 1112013-57-6C21H18N4O5S
Ethyl 4-(2-((6-(3-nitrophenyl)pyridazin-3-yl)thio)acetamido)benzoate chemical structure, C21H18N4O5S, CAS 893997-88-1
Ethyl 4-(2-((6-(3-nitrophenyl)pyridazin-3-yl)thio)acetamido)benzoate
CAS 893997-88-1C21H18N4O5S
N-(3,4-Dihydro-2H-1,5-benzodioxepin-7-yl)-2-[7-(furan-2-yl)-2-methyl-4-oxo-4H,5H-[1,3]thiazolo[4,5-d]pyridazin-5-yl]acetamide chemical structure, C21H18N4O5S, CAS 946342-18-3
N-(3,4-Dihydro-2H-1,5-benzodioxepin-7-yl)-2-[7-(furan-2-yl)-2-methyl-4-oxo-4H,5H-[1,3]thiazolo[4,5-d]pyridazin-5-yl]acetamide
CAS 946342-18-3C21H18N4O5S
N-(5-(7-Methoxybenzofuran-2-carbonyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)-5-methylisoxazole-3-carboxamide chemical structure, C21H18N4O5S, CAS 1396877-81-8
N-(5-(7-Methoxybenzofuran-2-carbonyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)-5-methylisoxazole-3-carboxamide
CAS 1396877-81-8C21H18N4O5S
N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-{[5-(furan-2-yl)-4-(furan-2-ylmethyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetamide chemical structure, C21H18N4O5S, CAS 575471-33-9
N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-{[5-(furan-2-yl)-4-(furan-2-ylmethyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetamide
CAS 575471-33-9C21H18N4O5S
N-(2,5-Dimethoxyphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carboxamide chemical structure, C21H18N4O5S, CAS 852135-94-5
N-(2,5-Dimethoxyphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carboxamide
CAS 852135-94-5C21H18N4O5S
N-(3,4-Dimethoxyphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carboxamide chemical structure, C21H18N4O5S, CAS 852135-92-3
N-(3,4-Dimethoxyphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carboxamide
CAS 852135-92-3C21H18N4O5S
6-(((3-(2-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)thio)-7-methyl-[1,3]dioxolo[4,5-g]quinazolin-8(7H)-one chemical structure, C21H18N4O5S, CAS 1111992-92-7
6-(((3-(2-Ethoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)thio)-7-methyl-[1,3]dioxolo[4,5-g]quinazolin-8(7H)-one
CAS 1111992-92-7C21H18N4O5S
(E)-N-(5-(3-(Benzo[d][1,3]dioxol-5-yl)acryloyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)-5-methylisoxazole-3-carboxamide chemical structure, C21H18N4O5S, CAS 1396892-75-3
(E)-N-(5-(3-(Benzo[d][1,3]dioxol-5-yl)acryloyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)-5-methylisoxazole-3-carboxamide
CAS 1396892-75-3C21H18N4O5S
3-Cyano-3-(2,3-dihydro-1H-1,3-benzodiazol-2-ylidene)-2-oxopropyl 2-(2-phenylethenesulfonamido)acetate chemical structure, C21H18N4O5S, CAS 731831-16-6
3-Cyano-3-(2,3-dihydro-1H-1,3-benzodiazol-2-ylidene)-2-oxopropyl 2-(2-phenylethenesulfonamido)acetate
CAS 731831-16-6C21H18N4O5S
Ethyl 4-[(7Z)-7-[(4-nitrophenyl)methylidene]-6-oxo-2,4-dihydro-[1,3]thiazolo[3,2-a][1,3,5]triazin-3-yl]benzoate chemical structure, C21H18N4O5S, CAS 488100-21-6
Ethyl 4-[(7Z)-7-[(4-nitrophenyl)methylidene]-6-oxo-2,4-dihydro-[1,3]thiazolo[3,2-a][1,3,5]triazin-3-yl]benzoate
CAS 488100-21-6C21H18N4O5S

Frequently asked questions

What is the molar mass of C21H18N4O5S?

The molar mass of C21H18N4O5S is 438.46 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms, 5 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 438.0998 Da.

How many compounds have the formula C21H18N4O5S?

CompoundList lists 40 compounds with the molecular formula C21H18N4O5S, including N-[4-({[4-(1-Oxo-3,4-dihydro-1H-isochromen-3-yl)-2-pyrimidinyl]amino}sulfonyl)phenyl]acetamide, 4-[Ethyl(phenyl)sulfamoyl]-N-[5-(furan-2-yl)-1,3,4-oxadiazol-2-yl]benzamide, 1-(3-(1H-Imidazol-1-yl)propyl)-3-hydroxy-5-(3-nitrophenyl)-4-(thiophene-2-carbonyl)-1H-pyrrol-2(5H)-one. 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 C21H18N4O5S?

C21H18N4O5S has a degree of unsaturation of 15. 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.