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Molecular formula

C18H21N3O4S

242 compounds have this formula on CompoundList.

Molar mass
375.44g/mol
Monoisotopic mass
378.1441Da
Atoms
47
Elements
5
Rings plus double bonds
10

The formula C18H21N3O4S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 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 × 1857.58%
    12.011 × 18 = 216.198 g/mol
  • H Hydrogen × 215.64%
    1.008 × 21 = 21.168 g/mol
  • N Nitrogen × 311.19%
    14.007 × 3 = 42.021 g/mol
  • O Oxygen × 417.05%
    15.999 × 4 = 63.996 g/mol
  • S Sulfur × 18.54%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C18H21N3O4S

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

Showing 201 to 242 of 242 compounds

N-{3-Methoxy-4-[(morpholin-4-ylacetyl)amino]phenyl}thiophene-2-carboxamide chemical structure, C18H21N3O4S, CAS 936819-91-9
N-{3-Methoxy-4-[(morpholin-4-ylacetyl)amino]phenyl}thiophene-2-carboxamide
CAS 936819-91-9C18H21N3O4S
3-(Butylsulfamoyl)-N-(4-carbamoylphenyl)benzamide chemical structure, C18H21N3O4S, CAS 945354-86-9
3-(Butylsulfamoyl)-N-(4-carbamoylphenyl)benzamide
CAS 945354-86-9C18H21N3O4S
2-{2-[(1E)-1-{2-[(2,4-Dimethylphenyl)sulfonyl]hydrazinylidene}ethyl]phenoxy}acetamide chemical structure, C18H21N3O4S, CAS 727373-92-4
2-{2-[(1E)-1-{2-[(2,4-Dimethylphenyl)sulfonyl]hydrazinylidene}ethyl]phenoxy}acetamide
CAS 727373-92-4C18H21N3O4S
[(1-Cyano-1,2-dimethylpropyl)carbamoyl]methyl 2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetate chemical structure, C18H21N3O4S, CAS 930695-50-4
[(1-Cyano-1,2-dimethylpropyl)carbamoyl]methyl 2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)acetate
CAS 930695-50-4C18H21N3O4S
N-[4-(Acetylamino)phenyl]-4-[ethyl(methylsulfonyl)amino]benzamide chemical structure, C18H21N3O4S, CAS 928940-55-0
N-[4-(Acetylamino)phenyl]-4-[ethyl(methylsulfonyl)amino]benzamide
CAS 928940-55-0C18H21N3O4S
N'-(3-Methoxy-4-propoxybenzoyl)-2-(methylsulfanyl)pyridine-3-carbohydrazide chemical structure, C18H21N3O4S, CAS 1017178-99-2
N'-(3-Methoxy-4-propoxybenzoyl)-2-(methylsulfanyl)pyridine-3-carbohydrazide
CAS 1017178-99-2C18H21N3O4S
N-({2-[4-(Propan-2-yl)phenyl]-1,3-thiazol-4-yl}acetyl)glycylglycine chemical structure, C18H21N3O4S, CAS 1081134-37-3
N-({2-[4-(Propan-2-yl)phenyl]-1,3-thiazol-4-yl}acetyl)glycylglycine
CAS 1081134-37-3C18H21N3O4S
N-(3,4-Dimethoxyphenethyl)-2-(5-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidin-3-yl)acetamide chemical structure, C18H21N3O4S, CAS 946341-76-0
N-(3,4-Dimethoxyphenethyl)-2-(5-oxo-3,5-dihydro-2H-thiazolo[3,2-a]pyrimidin-3-yl)acetamide
CAS 946341-76-0C18H21N3O4S
2-{[N-(4-Methylphenyl)-N-(methylsulfonyl)alanyl]amino}benzamide chemical structure, C18H21N3O4S, CAS 1268970-27-9
2-{[N-(4-Methylphenyl)-N-(methylsulfonyl)alanyl]amino}benzamide
CAS 1268970-27-9C18H21N3O4S
N-{4-[(Cyclobutylmethyl)amino]-3-nitrophenyl}-N-methylbenzenesulfonamide chemical structure, C18H21N3O4S, CAS 849350-99-8
N-{4-[(Cyclobutylmethyl)amino]-3-nitrophenyl}-N-methylbenzenesulfonamide
CAS 849350-99-8C18H21N3O4S
1-[(3,4-Dipropoxyphenyl)sulfonyl]-1H-1,2,3-benzotriazole chemical structure, C18H21N3O4S, CAS 1374685-03-6
1-[(3,4-Dipropoxyphenyl)sulfonyl]-1H-1,2,3-benzotriazole
CAS 1374685-03-6C18H21N3O4S
4-{[1-(2,3-Dihydro-1-benzofuran-5-sulfonyl)pyrrolidin-3-yl]oxy}-2,6-dimethylpyrimidine chemical structure, C18H21N3O4S, CAS 2097932-50-6
4-{[1-(2,3-Dihydro-1-benzofuran-5-sulfonyl)pyrrolidin-3-yl]oxy}-2,6-dimethylpyrimidine
CAS 2097932-50-6C18H21N3O4S
N'-(3-Acetamidophenyl)-N-{2-hydroxy-2-[(thiophen-3-yl)methyl]propyl}ethanediamide chemical structure, C18H21N3O4S, CAS 2097861-63-5
N'-(3-Acetamidophenyl)-N-{2-hydroxy-2-[(thiophen-3-yl)methyl]propyl}ethanediamide
CAS 2097861-63-5C18H21N3O4S
(E)-N-[[(2R,5S)-5-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)oxolan-2-yl]methyl]-2-phenylethenesulfonamide chemical structure, C18H21N3O4S, CAS 2223272-26-0
(E)-N-[[(2R,5S)-5-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)oxolan-2-yl]methyl]-2-phenylethenesulfonamide
CAS 2223272-26-0C18H21N3O4S
3-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)-1-[(E)-2-(4-methylphenyl)ethenyl]sulfonylpyrrolidin-3-ol chemical structure, C18H21N3O4S, CAS 2111909-51-2
3-(3-Cyclopropyl-1,2,4-oxadiazol-5-yl)-1-[(E)-2-(4-methylphenyl)ethenyl]sulfonylpyrrolidin-3-ol
CAS 2111909-51-2C18H21N3O4S
3-Cyclopropyl-5-[(2R,4S)-4-methoxy-1-(2-phenylethenesulfonyl)pyrrolidin-2-yl]-1,2,4-oxadiazole chemical structure, C18H21N3O4S, CAS 2223247-89-8
3-Cyclopropyl-5-[(2R,4S)-4-methoxy-1-(2-phenylethenesulfonyl)pyrrolidin-2-yl]-1,2,4-oxadiazole
CAS 2223247-89-8C18H21N3O4S
1-(2,6-Dimethylphenyl)-4-(2-nitrophenyl)sulfonylpiperazine chemical structure, C18H21N3O4S, CAS 2361815-09-8
1-(2,6-Dimethylphenyl)-4-(2-nitrophenyl)sulfonylpiperazine
CAS 2361815-09-8C18H21N3O4S
1-(3,5-Dimethyl-1,2-oxazole-4-carbonyl)-4-(2-phenylethenesulfonyl)piperazine chemical structure, C18H21N3O4S, CAS 1004421-01-5
1-(3,5-Dimethyl-1,2-oxazole-4-carbonyl)-4-(2-phenylethenesulfonyl)piperazine
CAS 1004421-01-5C18H21N3O4S
1-(5-Cyclopropyl-2-phenyloxazole-4-carbonyl)-N-methylpyrrolidine-3-sulfonamide chemical structure, C18H21N3O4S, CAS 1808777-05-0
1-(5-Cyclopropyl-2-phenyloxazole-4-carbonyl)-N-methylpyrrolidine-3-sulfonamide
CAS 1808777-05-0C18H21N3O4S
1-(2-Methoxypyridin-4-yl)-4-(2-phenylethanesulfonyl)piperazin-2-one chemical structure, C18H21N3O4S, CAS 2380079-89-8
1-(2-Methoxypyridin-4-yl)-4-(2-phenylethanesulfonyl)piperazin-2-one
CAS 2380079-89-8C18H21N3O4S
4-(2,5-Dimethylbenzenesulfonyl)-1-(2-methoxypyridin-4-yl)piperazin-2-one chemical structure, C18H21N3O4S, CAS 2380086-09-7
4-(2,5-Dimethylbenzenesulfonyl)-1-(2-methoxypyridin-4-yl)piperazin-2-one
CAS 2380086-09-7C18H21N3O4S
4-[4-(Cyclopropanesulfonyl)piperazine-1-carbonyl]-6-methoxyquinoline chemical structure, C18H21N3O4S, CAS 2415470-28-7
4-[4-(Cyclopropanesulfonyl)piperazine-1-carbonyl]-6-methoxyquinoline
CAS 2415470-28-7C18H21N3O4S
2-(4-Ethylphenyl)-1-(2-nitrobenzenesulfonyl)piperazine chemical structure, C18H21N3O4S, CAS 1835281-61-2
2-(4-Ethylphenyl)-1-(2-nitrobenzenesulfonyl)piperazine
CAS 1835281-61-2C18H21N3O4S
2-(4-Ethylphenyl)-1-(4-nitrobenzenesulfonyl)piperazine chemical structure, C18H21N3O4S, CAS 1839787-96-0
2-(4-Ethylphenyl)-1-(4-nitrobenzenesulfonyl)piperazine
CAS 1839787-96-0C18H21N3O4S

Frequently asked questions

What is the molar mass of C18H21N3O4S?

The molar mass of C18H21N3O4S is 375.44 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 378.1441 Da.

How many compounds have the formula C18H21N3O4S?

CompoundList lists 242 compounds with the molecular formula C18H21N3O4S, including N-{3-Methoxy-4-[(morpholin-4-ylacetyl)amino]phenyl}thiophene-2-carboxamide, 3-(Butylsulfamoyl)-N-(4-carbamoylphenyl)benzamide, 2-{2-[(1E)-1-{2-[(2,4-Dimethylphenyl)sulfonyl]hydrazinylidene}ethyl]phenoxy}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 C18H21N3O4S?

C18H21N3O4S 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.