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Molecular formula

C21H18N2O4S

169 compounds have this formula on CompoundList.

Molar mass
394.44g/mol
Monoisotopic mass
394.0987Da
Atoms
46
Elements
5
Rings plus double bonds
14

The formula C21H18N2O4S describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 2 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 × 2163.95%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 184.60%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 27.10%
    14.007 × 2 = 28.014 g/mol
  • O Oxygen × 416.22%
    15.999 × 4 = 63.996 g/mol
  • S Sulfur × 18.13%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C21H18N2O4S

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

Showing 101 to 169 of 169 compounds

3-Methyl-N-(10-methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 921919-40-6
3-Methyl-N-(10-methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide
CAS 921919-40-6C21H18N2O4S
N-(10-Ethyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 922062-09-7
N-(10-Ethyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide
CAS 922062-09-7C21H18N2O4S
4-Ethyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 922137-38-0
4-Ethyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide
CAS 922137-38-0C21H18N2O4S
3,4-Dimethyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 921920-59-4
3,4-Dimethyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide
CAS 921920-59-4C21H18N2O4S
N-(11-Oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)-1-(m-tolyl)methanesulfonamide chemical structure, C21H18N2O4S, CAS 922034-70-6
N-(11-Oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)-1-(m-tolyl)methanesulfonamide
CAS 922034-70-6C21H18N2O4S
N-(11-Oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)-1-(p-tolyl)methanesulfonamide chemical structure, C21H18N2O4S, CAS 922063-24-9
N-(11-Oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)-1-(p-tolyl)methanesulfonamide
CAS 922063-24-9C21H18N2O4S
4-Methyl-N-(8-methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 922035-00-5
4-Methyl-N-(8-methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide
CAS 922035-00-5C21H18N2O4S
N-(8,10-Dimethyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 922036-46-2
N-(8,10-Dimethyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide
CAS 922036-46-2C21H18N2O4S
N-(3-Carbamoyl-5-phenylthiophen-2-yl)-3-methyl-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide chemical structure, C21H18N2O4S, CAS 1286713-90-3
N-(3-Carbamoyl-5-phenylthiophen-2-yl)-3-methyl-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide
CAS 1286713-90-3C21H18N2O4S
1H-Pyrrolo[2,3-b]pyridine, 5-(3,4-dimethoxyphenyl)-1-(phenylsulfonyl)- chemical structure, C21H18N2O4S, CAS 880771-26-6
1H-Pyrrolo[2,3-b]pyridine, 5-(3,4-dimethoxyphenyl)-1-(phenylsulfonyl)-
CAS 880771-26-6C21H18N2O4S
N1-((5-benzoylthiophen-2-yl)methyl)-N2-(2-methoxyphenyl)oxalamide chemical structure, C21H18N2O4S, CAS 1797963-15-5
N1-((5-benzoylthiophen-2-yl)methyl)-N2-(2-methoxyphenyl)oxalamide
CAS 1797963-15-5C21H18N2O4S
N-(4-(Furan-3-yl)benzyl)-4-(2-methyloxazol-4-yl)benzenesulfonamide chemical structure, C21H18N2O4S, CAS 2034279-96-2
N-(4-(Furan-3-yl)benzyl)-4-(2-methyloxazol-4-yl)benzenesulfonamide
CAS 2034279-96-2C21H18N2O4S
5-(5-(((4-Methylbenzyl)sulfonyl)methyl)furan-2-yl)-3-phenyl-1,2,4-oxadiazole chemical structure, C21H18N2O4S, CAS 2034513-42-1
5-(5-(((4-Methylbenzyl)sulfonyl)methyl)furan-2-yl)-3-phenyl-1,2,4-oxadiazole
CAS 2034513-42-1C21H18N2O4S
(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-(1,3-thiazol-5-yl)propanoic acid chemical structure, C21H18N2O4S, CAS 1998630-32-2
(2R)-2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-(1,3-thiazol-5-yl)propanoic acid
CAS 1998630-32-2C21H18N2O4S
3-({3-Methyl-4-[(thiophen-2-ylcarbonyl)amino]phenyl}carbamoyl)phenyl acetate chemical structure, C21H18N2O4S, CAS 724747-48-2
3-({3-Methyl-4-[(thiophen-2-ylcarbonyl)amino]phenyl}carbamoyl)phenyl acetate
CAS 724747-48-2C21H18N2O4S
Methyl 4-(3-{(E)-[2,4-dioxo-3-(prop-2-yn-1-yl)-1,3-thiazolidin-5-ylidene]methyl}-2,5-dimethyl-1H-pyrrol-1-yl)benzoate chemical structure, C21H18N2O4S, CAS 431940-96-4
Methyl 4-(3-{(E)-[2,4-dioxo-3-(prop-2-yn-1-yl)-1,3-thiazolidin-5-ylidene]methyl}-2,5-dimethyl-1H-pyrrol-1-yl)benzoate
CAS 431940-96-4C21H18N2O4S
2-(3-Methylphenoxy)-N-[4-(4-nitrophenyl)sulfanylphenyl]acetamide chemical structure, C21H18N2O4S, CAS 667411-02-1
2-(3-Methylphenoxy)-N-[4-(4-nitrophenyl)sulfanylphenyl]acetamide
CAS 667411-02-1C21H18N2O4S
2-[2-[(E)-(2,4-Dioxo-3-prop-2-enyl-1,3-thiazolidin-5-ylidene)methyl]phenoxy]-N-phenylacetamide chemical structure, C21H18N2O4S, CAS 593265-96-4
2-[2-[(E)-(2,4-Dioxo-3-prop-2-enyl-1,3-thiazolidin-5-ylidene)methyl]phenoxy]-N-phenylacetamide
CAS 593265-96-4C21H18N2O4S
N-(Diphenylmethyl)-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-sulfonamide chemical structure, C21H18N2O4S, CAS 696636-18-7
N-(Diphenylmethyl)-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-sulfonamide
CAS 696636-18-7C21H18N2O4S
Ethyl 3-amino-4-(furan-2-yl)-6-(4-methoxyphenyl)thieno[2,3-b]pyridine-2-carboxylate chemical structure, C21H18N2O4S, CAS 897831-99-1
Ethyl 3-amino-4-(furan-2-yl)-6-(4-methoxyphenyl)thieno[2,3-b]pyridine-2-carboxylate
CAS 897831-99-1C21H18N2O4S
N-Benzyl-N-(4,7-dimethoxybenzo[d]thiazol-2-yl)furan-2-carboxamide chemical structure, C21H18N2O4S, CAS 899735-08-1
N-Benzyl-N-(4,7-dimethoxybenzo[d]thiazol-2-yl)furan-2-carboxamide
CAS 899735-08-1C21H18N2O4S
4-Ethoxy-N-(4-(7-methoxybenzofuran-2-yl)thiazol-2-yl)benzamide chemical structure, C21H18N2O4S, CAS 921525-39-5
4-Ethoxy-N-(4-(7-methoxybenzofuran-2-yl)thiazol-2-yl)benzamide
CAS 921525-39-5C21H18N2O4S
N-(4-(7-Methoxybenzofuran-2-yl)thiazol-2-yl)-2-(4-methoxyphenyl)acetamide chemical structure, C21H18N2O4S, CAS 921797-38-8
N-(4-(7-Methoxybenzofuran-2-yl)thiazol-2-yl)-2-(4-methoxyphenyl)acetamide
CAS 921797-38-8C21H18N2O4S
N-(4-(7-Ethoxybenzofuran-2-yl)thiazol-2-yl)-3-methoxybenzamide chemical structure, C21H18N2O4S, CAS 921569-47-3
N-(4-(7-Ethoxybenzofuran-2-yl)thiazol-2-yl)-3-methoxybenzamide
CAS 921569-47-3C21H18N2O4S

Frequently asked questions

What is the molar mass of C21H18N2O4S?

The molar mass of C21H18N2O4S is 394.44 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 394.0987 Da.

How many compounds have the formula C21H18N2O4S?

CompoundList lists 169 compounds with the molecular formula C21H18N2O4S, including 3-Methyl-N-(10-methyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide, N-(10-Ethyl-11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide, 4-Ethyl-N-(11-oxo-10,11-dihydrodibenzo[b,f][1,4]oxazepin-2-yl)benzenesulfonamide. 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 C21H18N2O4S?

C21H18N2O4S has a degree of unsaturation of 14. 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.