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Molecular formula

C18H21N3O3S

227 compounds have this formula on CompoundList.

Molar mass
359.44g/mol
Monoisotopic mass
363.1555Da
Atoms
46
Elements
5
Rings plus double bonds
10

The formula C18H21N3O3S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 3 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 × 1860.15%
    12.011 × 18 = 216.198 g/mol
  • H Hydrogen × 215.89%
    1.008 × 21 = 21.168 g/mol
  • N Nitrogen × 311.69%
    14.007 × 3 = 42.021 g/mol
  • O Oxygen × 313.35%
    15.999 × 3 = 47.997 g/mol
  • S Sulfur × 18.92%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C18H21N3O3S

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

Showing 201 to 227 of 227 compounds

N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-3-[4,6-dimethyl-2-(methylsulfanyl)pyrimidin-5-yl]propanamide chemical structure, C18H21N3O3S, CAS 1007761-04-7
N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-3-[4,6-dimethyl-2-(methylsulfanyl)pyrimidin-5-yl]propanamide
CAS 1007761-04-7C18H21N3O3S
N-Benzyl-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide chemical structure, C18H21N3O3S, CAS 1040665-79-9
N-Benzyl-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide
CAS 1040665-79-9C18H21N3O3S
3-[(4-Methylpiperidin-1-yl)sulfonyl]-N-(pyridin-3-yl)benzamide chemical structure, C18H21N3O3S, CAS 1269261-03-1
3-[(4-Methylpiperidin-1-yl)sulfonyl]-N-(pyridin-3-yl)benzamide
CAS 1269261-03-1C18H21N3O3S
Propanamide, 2-[(1-methylethyl)sulfonyl]-N-[4-(2-phenyldiazenyl)phenyl]- chemical structure, C18H21N3O3S, CAS 1390955-83-5
Propanamide, 2-[(1-methylethyl)sulfonyl]-N-[4-(2-phenyldiazenyl)phenyl]-
CAS 1390955-83-5C18H21N3O3S
N-Ethyl-N-(imidazo[1,2-a]pyridin-3-ylmethyl)-4-methoxy-3-methylbenzenesulfonamide chemical structure, C18H21N3O3S, CAS 1448047-12-8
N-Ethyl-N-(imidazo[1,2-a]pyridin-3-ylmethyl)-4-methoxy-3-methylbenzenesulfonamide
CAS 1448047-12-8C18H21N3O3S
1-[(2H-1,3-Benzodioxol-5-yl)methyl]-3-{1-[(thiophen-3-yl)methyl]pyrrolidin-3-yl}urea chemical structure, C18H21N3O3S, CAS 2097893-82-6
1-[(2H-1,3-Benzodioxol-5-yl)methyl]-3-{1-[(thiophen-3-yl)methyl]pyrrolidin-3-yl}urea
CAS 2097893-82-6C18H21N3O3S
3-Ethyl-7-[(E)-2-(4-methylphenyl)ethenyl]sulfonyl-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-4-one chemical structure, C18H21N3O3S, CAS 2111901-45-0
3-Ethyl-7-[(E)-2-(4-methylphenyl)ethenyl]sulfonyl-6,8-dihydro-5H-pyrido[3,4-d]pyrimidin-4-one
CAS 2111901-45-0C18H21N3O3S
2-Methanesulfonyl-5-methyl-4-(3-phenylpiperidine-1-carbonyl)pyrimidine chemical structure, C18H21N3O3S, CAS 2223944-30-5
2-Methanesulfonyl-5-methyl-4-(3-phenylpiperidine-1-carbonyl)pyrimidine
CAS 2223944-30-5C18H21N3O3S
4-(2-Benzylpyrrolidine-1-carbonyl)-2-methanesulfonyl-5-methylpyrimidine chemical structure, C18H21N3O3S, CAS 2249200-68-6
4-(2-Benzylpyrrolidine-1-carbonyl)-2-methanesulfonyl-5-methylpyrimidine
CAS 2249200-68-6C18H21N3O3S
N-Butyl-2-[(7-methyl-3-oxo-1,4-benzoxazin-4-yl)methyl]-1,3-thiazole-4-carboxamide chemical structure, C18H21N3O3S, CAS 5973-21-7
N-Butyl-2-[(7-methyl-3-oxo-1,4-benzoxazin-4-yl)methyl]-1,3-thiazole-4-carboxamide
CAS 5973-21-7C18H21N3O3S
1-(3-{[5-(Piperidine-1-sulfonyl)pyridin-2-yl]amino}phenyl)ethan-1-one chemical structure, C18H21N3O3S, CAS 7065-84-1
1-(3-{[5-(Piperidine-1-sulfonyl)pyridin-2-yl]amino}phenyl)ethan-1-one
CAS 7065-84-1C18H21N3O3S
N-{[6-(Morpholin-4-yl)pyridin-3-yl]methyl}-2-phenylethene-1-sulfonamide chemical structure, C18H21N3O3S, CAS 1090622-94-8
N-{[6-(Morpholin-4-yl)pyridin-3-yl]methyl}-2-phenylethene-1-sulfonamide
CAS 1090622-94-8C18H21N3O3S
N-(2-(3,6-Dihydro-2H-pyran-4-yl)ethyl)-3-(4-oxo-2-thioxo-1,4-dihydroquinazolin-3(2H)-yl)propanamide chemical structure, C18H21N3O3S, CAS 1808412-84-1
N-(2-(3,6-Dihydro-2H-pyran-4-yl)ethyl)-3-(4-oxo-2-thioxo-1,4-dihydroquinazolin-3(2H)-yl)propanamide
CAS 1808412-84-1C18H21N3O3S
N-[(6-Cyclopropylpyridin-3-yl)methyl]-4-(dimethylsulfamoyl)benzamide chemical structure, C18H21N3O3S, CAS 2097926-05-9
N-[(6-Cyclopropylpyridin-3-yl)methyl]-4-(dimethylsulfamoyl)benzamide
CAS 2097926-05-9C18H21N3O3S
N-[1-(1-Benzothiophen-3-yl)propan-2-yl]-4-ethyl-2,3-dioxopiperazine-1-carboxamide chemical structure, C18H21N3O3S, CAS 2097864-41-8
N-[1-(1-Benzothiophen-3-yl)propan-2-yl]-4-ethyl-2,3-dioxopiperazine-1-carboxamide
CAS 2097864-41-8C18H21N3O3S
2-[1-(Cyclopropanesulfonyl)piperidin-4-yl]-6-phenyl-2,3-dihydropyridazin-3-one chemical structure, C18H21N3O3S, CAS 2379986-95-3
2-[1-(Cyclopropanesulfonyl)piperidin-4-yl]-6-phenyl-2,3-dihydropyridazin-3-one
CAS 2379986-95-3C18H21N3O3S
3-(2-Phenylethenesulfonamido)-N-[1-(pyridin-3-yl)ethyl]propanamide chemical structure, C18H21N3O3S, CAS 878917-51-2
3-(2-Phenylethenesulfonamido)-N-[1-(pyridin-3-yl)ethyl]propanamide
CAS 878917-51-2C18H21N3O3S
4-{[1-(4-Methylthiophene-2-carbonyl)piperidin-4-yl]methoxy}pyridine-2-carboxamide chemical structure, C18H21N3O3S, CAS 2877666-59-4
4-{[1-(4-Methylthiophene-2-carbonyl)piperidin-4-yl]methoxy}pyridine-2-carboxamide
CAS 2877666-59-4C18H21N3O3S
4-{[1-(5-Methylthiophene-2-carbonyl)piperidin-4-yl]methoxy}pyridine-2-carboxamide chemical structure, C18H21N3O3S, CAS 2877628-41-4
4-{[1-(5-Methylthiophene-2-carbonyl)piperidin-4-yl]methoxy}pyridine-2-carboxamide
CAS 2877628-41-4C18H21N3O3S
N-[4-[[1-(2,4-Dimethylphenyl)ethylideneamino]sulfamoyl]phenyl]acetamide chemical structure, C18H21N3O3S, CAS 5432-75-7
N-[4-[[1-(2,4-Dimethylphenyl)ethylideneamino]sulfamoyl]phenyl]acetamide
CAS 5432-75-7C18H21N3O3S
N-[4-[[(E)-1-(2,4-Dimethylphenyl)ethylideneamino]sulfamoyl]phenyl]acetamide chemical structure, C18H21N3O3S
N-[4-[[(E)-1-(2,4-Dimethylphenyl)ethylideneamino]sulfamoyl]phenyl]acetamide
C18H21N3O3S
1-(2-Methoxypyridin-4-yl)-4-[3-(3-methylthiophen-2-yl)propanoyl]piperazin-2-one chemical structure, C18H21N3O3S, CAS 2380081-18-3
1-(2-Methoxypyridin-4-yl)-4-[3-(3-methylthiophen-2-yl)propanoyl]piperazin-2-one
CAS 2380081-18-3C18H21N3O3S
3-{[1-(Benzenesulfonyl)pyrrolidin-3-yl]methoxy}-6-cyclopropylpyridazine chemical structure, C18H21N3O3S, CAS 2549027-74-7
3-{[1-(Benzenesulfonyl)pyrrolidin-3-yl]methoxy}-6-cyclopropylpyridazine
CAS 2549027-74-7C18H21N3O3S
3-{[1-(Cyclopropanesulfonyl)pyrrolidin-3-yl]methoxy}-6-phenylpyridazine chemical structure, C18H21N3O3S, CAS 2548998-96-3
3-{[1-(Cyclopropanesulfonyl)pyrrolidin-3-yl]methoxy}-6-phenylpyridazine
CAS 2548998-96-3C18H21N3O3S

Frequently asked questions

What is the molar mass of C18H21N3O3S?

The molar mass of C18H21N3O3S is 359.44 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 363.1555 Da.

How many compounds have the formula C18H21N3O3S?

CompoundList lists 227 compounds with the molecular formula C18H21N3O3S, including N-(2,3-Dihydro-1,4-benzodioxin-6-yl)-3-[4,6-dimethyl-2-(methylsulfanyl)pyrimidin-5-yl]propanamide, N-Benzyl-2-(1,1-dioxidotetrahydrothiophen-3-yl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide, 3-[(4-Methylpiperidin-1-yl)sulfonyl]-N-(pyridin-3-yl)benzamide. 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 C18H21N3O3S?

C18H21N3O3S 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.