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Molecular formula

C18H21NO4S

219 compounds have this formula on CompoundList.

Molar mass
347.43g/mol
Monoisotopic mass
347.1191Da
Atoms
45
Elements
5
Rings plus double bonds
9

The formula C18H21NO4S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 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 × 1862.23%
    12.011 × 18 = 216.198 g/mol
  • H Hydrogen × 216.09%
    1.008 × 21 = 21.168 g/mol
  • N Nitrogen × 14.03%
    14.007 × 1 = 14.007 g/mol
  • O Oxygen × 418.42%
    15.999 × 4 = 63.996 g/mol
  • S Sulfur × 19.23%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C18H21NO4S

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

Showing 201 to 219 of 219 compounds

Ethyl 2-(4-butoxy-3-formylphenyl)-4-methylthiazole-5-carboxylate chemical structure, C18H21NO4S, CAS 2230270-03-6
Ethyl 2-(4-butoxy-3-formylphenyl)-4-methylthiazole-5-carboxylate
CAS 2230270-03-6C18H21NO4S
Diethyl 1-benzyl-2-(methylsulfanyl)-1H-pyrrole-3,4-dicarboxylate chemical structure, C18H21NO4S, CAS 1879-19-2
Diethyl 1-benzyl-2-(methylsulfanyl)-1H-pyrrole-3,4-dicarboxylate
CAS 1879-19-2C18H21NO4S
2-Benzyl-5-methoxy-3-(4-methylbenzene-1-sulfonyl)-1,3-oxazolidine chemical structure, C18H21NO4S, CAS 62642-54-0
2-Benzyl-5-methoxy-3-(4-methylbenzene-1-sulfonyl)-1,3-oxazolidine
CAS 62642-54-0C18H21NO4S
4-Methoxy-N-[[1-(4-methoxyphenyl)cyclopropyl]methyl]benzenesulfonamide chemical structure, C18H21NO4S, CAS 1049478-84-3
4-Methoxy-N-[[1-(4-methoxyphenyl)cyclopropyl]methyl]benzenesulfonamide
CAS 1049478-84-3C18H21NO4S
5-Methoxy-4'-(piperidine-1-sulfonyl)[1,1'-biphenyl]-3-ol chemical structure, C18H21NO4S, CAS 1261979-54-7
5-Methoxy-4'-(piperidine-1-sulfonyl)[1,1'-biphenyl]-3-ol
CAS 1261979-54-7C18H21NO4S
2-Benzyl-3-butoxy-5-formylbenzene-1-sulfonamide chemical structure, C18H21NO4S, CAS 62274-24-2
2-Benzyl-3-butoxy-5-formylbenzene-1-sulfonamide
CAS 62274-24-2C18H21NO4S
N-[1-(2,3-Dimethoxyphenyl)prop-2-en-1-yl]-4-methylbenzene-1-sulfonamide chemical structure, C18H21NO4S, CAS 824390-91-2
N-[1-(2,3-Dimethoxyphenyl)prop-2-en-1-yl]-4-methylbenzene-1-sulfonamide
CAS 824390-91-2C18H21NO4S
N-[(4-Hydroxy-4,5,6,7-tetrahydro-1-benzothiophen-4-yl)methyl]-2,6-dimethoxybenzamide chemical structure, C18H21NO4S, CAS 2549025-42-3
N-[(4-Hydroxy-4,5,6,7-tetrahydro-1-benzothiophen-4-yl)methyl]-2,6-dimethoxybenzamide
CAS 2549025-42-3C18H21NO4S
2-{[(tert-Butoxy)carbonyl]amino}-4-(2,4-dimethylphenyl)thiophene-3-carboxylic acid chemical structure, C18H21NO4S, CAS 2639424-84-1
2-{[(tert-Butoxy)carbonyl]amino}-4-(2,4-dimethylphenyl)thiophene-3-carboxylic acid
CAS 2639424-84-1C18H21NO4S
2-{[(tert-Butoxy)carbonyl]amino}-5-methyl-4-(4-methylphenyl)thiophene-3-carboxylic acid chemical structure, C18H21NO4S, CAS 2639456-49-6
2-{[(tert-Butoxy)carbonyl]amino}-5-methyl-4-(4-methylphenyl)thiophene-3-carboxylic acid
CAS 2639456-49-6C18H21NO4S
2-{[(tert-Butoxy)carbonyl]amino}-4-(3,4-dimethylphenyl)thiophene-3-carboxylic acid chemical structure, C18H21NO4S, CAS 2639423-17-7
2-{[(tert-Butoxy)carbonyl]amino}-4-(3,4-dimethylphenyl)thiophene-3-carboxylic acid
CAS 2639423-17-7C18H21NO4S
2-{[(tert-Butoxy)carbonyl]amino}-4-(2,5-dimethylphenyl)thiophene-3-carboxylic acid chemical structure, C18H21NO4S, CAS 2639423-20-2
2-{[(tert-Butoxy)carbonyl]amino}-4-(2,5-dimethylphenyl)thiophene-3-carboxylic acid
CAS 2639423-20-2C18H21NO4S
4-{[(tert-Butoxy)carbonyl][2-(thiophen-2-yl)ethyl]amino}benzoic acid chemical structure, C18H21NO4S, CAS 2639425-79-7
4-{[(tert-Butoxy)carbonyl][2-(thiophen-2-yl)ethyl]amino}benzoic acid
CAS 2639425-79-7C18H21NO4S
2-{[(tert-Butoxy)carbonyl]amino}-4-(4-ethylphenyl)thiophene-3-carboxylic acid chemical structure, C18H21NO4S, CAS 2639451-10-6
2-{[(tert-Butoxy)carbonyl]amino}-4-(4-ethylphenyl)thiophene-3-carboxylic acid
CAS 2639451-10-6C18H21NO4S
4-{[(tert-Butoxy)carbonyl][2-(thiophen-3-yl)ethyl]amino}benzoic acid chemical structure, C18H21NO4S, CAS 2680783-55-3
4-{[(tert-Butoxy)carbonyl][2-(thiophen-3-yl)ethyl]amino}benzoic acid
CAS 2680783-55-3C18H21NO4S
Benzyl 3-[2-hydroxy-2-(thiophen-2-yl)ethyl]morpholine-4-carboxylate chemical structure, C18H21NO4S, CAS 2680619-51-4
Benzyl 3-[2-hydroxy-2-(thiophen-2-yl)ethyl]morpholine-4-carboxylate
CAS 2680619-51-4C18H21NO4S
tert-Butyl (4-(phenylsulfonyl)benzyl)carbamate chemical structure, C18H21NO4S, CAS 2751980-73-9
tert-Butyl (4-(phenylsulfonyl)benzyl)carbamate
CAS 2751980-73-9C18H21NO4S
Ethyl 2-(4-(sec-butoxy)-3-formylphenyl)-4-methylthiazole-5-carboxylate chemical structure, C18H21NO4S, CAS 2375033-31-9
Ethyl 2-(4-(sec-butoxy)-3-formylphenyl)-4-methylthiazole-5-carboxylate
CAS 2375033-31-9C18H21NO4S
4-(1,1-Dimethyl-2-oxo-3H-benzo[e]indol-3-ium-3-yl)butane-1-sulfonate chemical structure, C18H21NO4S
4-(1,1-Dimethyl-2-oxo-3H-benzo[e]indol-3-ium-3-yl)butane-1-sulfonate
C18H21NO4S

Frequently asked questions

What is the molar mass of C18H21NO4S?

The molar mass of C18H21NO4S is 347.43 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 347.1191 Da.

How many compounds have the formula C18H21NO4S?

CompoundList lists 219 compounds with the molecular formula C18H21NO4S, including Ethyl 2-(4-butoxy-3-formylphenyl)-4-methylthiazole-5-carboxylate, Diethyl 1-benzyl-2-(methylsulfanyl)-1H-pyrrole-3,4-dicarboxylate, 2-Benzyl-5-methoxy-3-(4-methylbenzene-1-sulfonyl)-1,3-oxazolidine. 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 C18H21NO4S?

C18H21NO4S has a degree of unsaturation of 9. 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.