Molecular formula
C18H21NO3S
195 compounds have this formula on CompoundList.
- Molar mass
- 331.43g/mol
- Monoisotopic mass
- 331.1242Da
- Atoms
- 44
- Elements
- 5
- Rings plus double bonds
- 9
The formula C18H21NO3S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 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 × 1865.23%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.39%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.23%14.007 × 1 = 14.007 g/mol
- O Oxygen × 314.48%15.999 × 3 = 47.997 g/mol
- S Sulfur × 19.67%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H21NO3S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 195 of 195 compounds
(3,5-Dimethoxyphenyl)(4-(thiophen-3-yl)piperidin-1-yl)methanone
CAS 1396851-50-5C18H21NO3S
2-(2-Methoxyphenoxy)-1-(4-(thiophen-3-yl)piperidin-1-yl)ethanone
CAS 1421531-06-7C18H21NO3S
N-(2-Hydroxy-2-methyl-3-(methylthio)propyl)-4-phenoxybenzamide
CAS 1396852-45-1C18H21NO3S
2-Benzyl-4-(benzylsulfonyl)morpholine
CAS 1329330-90-6C18H21NO3S
(E)-N-(Furan-3-ylmethyl)-N-(2-methoxyethyl)-3-(4-(methylthio)phenyl)acrylamide
CAS 1798403-67-4C18H21NO3S
2-(Benzyloxy)-1-(7-(furan-2-yl)-1,4-thiazepan-4-yl)ethanone
CAS 1705223-28-4C18H21NO3S
1-(4-(Thiophen-3-yloxy)piperidin-1-yl)-2-(o-tolyloxy)ethanone
CAS 2034465-99-9C18H21NO3S
![1-[4-({3-Cyclopropylidene-8-azabicyclo[3.2.1]octan-8-yl}sulfonyl)phenyl]ethan-1-one chemical structure, C18H21NO3S, CAS 2191266-40-5](/s/PLDXAPYFMXSJAR-UHFFFAOYSA-N.svg)
1-[4-({3-Cyclopropylidene-8-azabicyclo[3.2.1]octan-8-yl}sulfonyl)phenyl]ethan-1-one
CAS 2191266-40-5C18H21NO3S
![6-[Hydroxy(diphenyl)methyl]-2-methyl-1lambda~6~,2-thiazinane-1,1-dione chemical structure, C18H21NO3S, CAS 54531-84-9](/s/PVFILLLLHRWRTA-UHFFFAOYSA-N.svg)
6-[Hydroxy(diphenyl)methyl]-2-methyl-1lambda~6~,2-thiazinane-1,1-dione
CAS 54531-84-9C18H21NO3S
![Ethyl 5-[2-(3,4-dimethylphenyl)acetamido]-3-methylthiophene-2-carboxylate chemical structure, C18H21NO3S, CAS 921788-33-2](/s/ZPZSXXRKEQJBTK-UHFFFAOYSA-N.svg)
Ethyl 5-[2-(3,4-dimethylphenyl)acetamido]-3-methylthiophene-2-carboxylate
CAS 921788-33-2C18H21NO3S
N-((1r,2s)-2-Hydroxy-2,3-dihydro-1H-inden-1-yl)-2,4,6-trimethylbenzenesulfonamide
CAS 175848-32-5C18H21NO3S
4-Methyl-N-(2-(1-oxopentyl)phenyl)benzenesulfonamide
CAS 758686-13-4C18H21NO3S
![Pyrrolidine, 3-(4-methoxyphenyl)-1-[(4-methylphenyl)sulfonyl]- chemical structure, C18H21NO3S, CAS 830319-66-9](/s/PUUWNXSVHZPXLT-UHFFFAOYSA-N.svg)
Pyrrolidine, 3-(4-methoxyphenyl)-1-[(4-methylphenyl)sulfonyl]-
CAS 830319-66-9C18H21NO3S
![1-[(2-Methoxy-4,5-dimethylphenyl)sulfonyl]-2-methylindoline chemical structure, C18H21NO3S, CAS 873579-79-4](/s/RJVJDHVKCFBJGL-UHFFFAOYSA-N.svg)
1-[(2-Methoxy-4,5-dimethylphenyl)sulfonyl]-2-methylindoline
CAS 873579-79-4C18H21NO3S
N-(1-Phenylethyl)-2-(propylsulfonyl)benzamide
CAS 945298-42-0C18H21NO3S
N-(2,2-Dimethyl-3,4-dihydro-2H-chromen-4-yl)-4-methylbenzenesulfonamide
CAS 932270-68-3C18H21NO3S
2-(4-Methoxy-3,5-dimethylbenzenesulfonyl)-1,2,3,4-tetrahydroisoquinoline
CAS 898647-70-6C18H21NO3S
2-(3,4-Dimethoxyphenyl)-N-((1-(thiophen-2-yl)cyclopropyl)methyl)acetamide
CAS 1203290-63-4C18H21NO3S
2-Methoxy-N-((4-(thiophen-2-yl)tetrahydro-2H-pyran-4-yl)methyl)benzamide
CAS 1203061-78-2C18H21NO3S
B5R3FK9Cvp
CAS 357425-93-5C18H21NO3S
4-Ethoxy-N-(2-hydroxy-2-(4-(methylthio)phenyl)ethyl)benzamide
CAS 1448054-26-9C18H21NO3S
N-(2-Hydroxy-2-(4-(methylthio)phenyl)ethyl)-2-phenoxypropanamide
CAS 1448028-23-6C18H21NO3S
N-(2-Hydroxy-2-(4-(methylthio)phenyl)ethyl)-2-(o-tolyloxy)acetamide
CAS 1448030-44-1C18H21NO3S
3-Methoxy-N-(tetrahydro-2H-pyran-4-yl)-N-(thiophen-2-ylmethyl)benzamide
CAS 1797140-22-7C18H21NO3S
- N-(2,3-Dihydro-1H-inden-1-yl)-N-(3-hydroxypropyl)-4-methoxythiophene-2-carboxamide1797202-15-3C18H21NO3S
- (E)-N-(2-(2-Hydroxyethoxy)-2-(p-tolyl)ethyl)-3-(thiophen-3-yl)acrylamide1798981-36-8C18H21NO3S
- 1-(7-(Furan-2-yl)-1,4-thiazepan-4-yl)-2-(o-tolyloxy)ethanone1787882-88-5C18H21NO3S
- 6-(2-(Dimethylamino)ethoxy)-4'-(methylsulfinyl)biphenyl-3-carbaldehyde1610373-02-8C18H21NO3S
- (E)-N-(2-Methoxy-2-(o-tolyl)ethyl)-2-phenylethenesulfonamide1706505-31-8C18H21NO3S
- 1-(7-(Furan-2-yl)-1,4-thiazepan-4-yl)-2-(2-methoxyphenyl)ethanone1705223-03-5C18H21NO3S
- N-((2-Hydroxy-2,3-dihydro-1H-inden-2-yl)methyl)-3,4-dimethylbenzenesulfonamide2034408-29-0C18H21NO3S
- N-((2-Hydroxy-2,3-dihydro-1H-inden-2-yl)methyl)-2-phenylethanesulfonamide2034408-37-0C18H21NO3S
- N-((2-Hydroxy-2,3-dihydro-1H-inden-2-yl)methyl)-2,5-dimethylbenzenesulfonamide2034595-33-8C18H21NO3S
- N-[(2-Methoxy-2,3-dihydro-1H-inden-2-yl)methyl]-1-phenylmethanesulfonamide2034261-47-5C18H21NO3S
- N-(2-(5-Acetylthiophen-2-yl)ethyl)-4-isopropoxybenzamide2034493-10-0C18H21NO3S
- N-[(1-Hydroxy-6-methoxy-1,2,3,4-tetrahydronaphthalen-1-yl)methyl]-2-(thiophen-3-yl)acetamide1904190-09-5C18H21NO3S
- 2-(3-Methoxyphenoxy)-N-[1-(thiophen-2-yl)cyclopentyl]acetamide2034482-82-9C18H21NO3S
- N-[2-(3,4-Dimethoxyphenyl)ethyl]-N-[(thiophen-3-yl)methyl]prop-2-enamide2094445-00-6C18H21NO3S
- 2-Phenoxy-1-(4-(thiophen-3-yloxy)piperidin-1-yl)propan-1-one2034364-07-1C18H21NO3S
- N-[(2-Methyloxiran-2-yl)methyl]-N-(1-phenylethyl)benzenesulfonamide87717-60-0C18H21NO3S
- Ethyl 4-ethyl-5-methyl-2-[(2-methylbenzoyl)amino]-3-thiophenecarboxylate544701-16-8C18H21NO3S
- Propanoic acid, 2-(((1-(5-(4-methylphenyl)-2-thienyl)ethylidene)amino)oxy)-, ethyl ester93599-08-7C18H21NO3S
- Acetic acid, (((1-(5-(4-ethylphenyl)-2-thienyl)ethylidene)amino)oxy)-, ethyl ester93599-18-9C18H21NO3S
- 4-(1,1-Dimethylethyl)-N-[(4-methylphenyl)sulfonyl]benzamide105536-26-3C18H21NO3S
- N-methyl-N-(2-methyl-4-oxo-2-phenylbutyl)Benzenesulfonamide209350-34-5C18H21NO3S
- [(4-Ethoxy-2,5-dimethylphenyl)sulfonyl]indoline873580-39-3C18H21NO3S
- N-(2,4-Dimethoxyphenyl)-2-(propan-2-ylsulfanyl)benzamide915897-09-5C18H21NO3S
- 2-[4-(Cyclohexylmethoxy)phenyl]-4-methyl-5-thiazolecarboxylic acid144059-87-0C18H21NO3S
- {[2-Methoxy-5-(methylethyl)phenyl]sulfonyl}indoline914235-94-2C18H21NO3S
- [(4-Ethoxy-2,3-dimethylphenyl)sulfonyl]indoline914235-98-6C18H21NO3S
- 4-Cyclohexyl-N-(2-hydroxyphenyl)benzenesulfonamide1018130-39-6C18H21NO3S
- Pioglitazone hydrochloride impurity 341229114-66-2C18H21NO3S
- N-(2-Hydroxy-2-(thiophen-3-yl)ethyl)-4-phenyltetrahydro-2H-pyran-4-carboxamide1251708-51-6C18H21NO3S
- N-Cyclopentyl-N-[(furan-2-yl)methyl]-2-phenylethene-1-sulfonamide1281694-50-5C18H21NO3S
- N-(2-Cyclopropyl-2-hydroxy-2-phenylethyl)-3-methylbenzenesulfonamide1421455-54-0C18H21NO3S
- (E)-N-(2-(2-Hydroxyethoxy)-2-(p-tolyl)ethyl)-3-(thiophen-2-yl)acrylamide1799258-74-4C18H21NO3S
- N-(1-(2,3-Dihydrobenzofuran-5-yl)propan-2-yl)-1-phenylmethanesulfonamide2034516-63-5C18H21NO3S
- N-[2-Hydroxy-2-(oxan-4-yl)-2-phenylethyl]thiophene-3-carboxamide2034257-98-0C18H21NO3S
- 4-Ethoxy-N-[(4-hydroxy-4,5,6,7-tetrahydro-1-benzothiophen-4-yl)methyl]benzamide2548994-56-3C18H21NO3S
- 3-Methyl-N-(oxiran-2-ylmethyl)-N-(1-phenylethyl)benzenesulfonamide87689-56-3C18H21NO3S
- Benzenesulfonamide, N-(1-(4-methylphenyl)ethyl)-N-(oxiranylmethyl)-87690-34-4C18H21NO3S
- Benzenesulfonamide, N-(oxiranylmethyl)-N-(1-phenylpropyl)-87717-62-2C18H21NO3S
- Benzenesulfonamide, N-(1-(3-methylphenyl)ethyl)-N-(2-oxiranylmethyl)-87690-45-7C18H21NO3S
- N-[(3-Methyloxiran-2-yl)methyl]-N-(1-phenylethyl)benzenesulfonamide87717-61-1C18H21NO3S
- N-(Oxiran-2-ylmethyl)-N-(2-phenylpropan-2-yl)benzenesulfonamide89820-04-2C18H21NO3S
- 2-Methyl-N-(oxiran-2-ylmethyl)-N-(1-phenylethyl)benzenesulfonamide89820-05-3C18H21NO3S
- Benzenesulfonamide, N-(1-(2-methylphenyl)ethyl)-N-(2-oxiranylmethyl)-89820-10-0C18H21NO3S
- (2R,3S)-1-(Diphenylmethyl)-2-methylazetidin-3-yl methanesulfonate164906-67-6C18H21NO3S
- 3-Azetidinol, 1-(diphenylmethyl)-2-methyl-, methanesulfonate (ester), cis-159556-74-8C18H21NO3S
- Benzenesulfonamide, 4-methyl-N-(1-methyl-3-oxo-4-phenylbutyl)-654643-34-2C18H21NO3S
- 2-Pyrrolidinemethanol, 1-[(4-methylphenyl)sulfonyl]-5-phenyl-, (2S,5R)-830319-92-1C18H21NO3S
- Acetic acid, [[(4-methoxyphenyl)methyl]thio](phenylamino)-, ethyl ester828257-77-8C18H21NO3S
- 2-Pyrrolidinemethanol, 1-[(4-methylphenyl)sulfonyl]-5-phenyl-, (2S,5S)-830319-93-2C18H21NO3S
- (1-Benzhydrylazetidin-2-yl)methyl methanesulfonate92992-31-9C18H21NO3S
- N-Methyl-N-[2-(2-methylphenoxy)ethyl]-2-phenylethene-1-sulfonamide1088151-79-4C18H21NO3S
- N-Methyl-N-[2-(3-methylphenoxy)ethyl]-2-phenylethene-1-sulfonamide1372372-67-2C18H21NO3S
- 4-[1-[(4-Methylphenyl)sulfonyl]-4-piperidinyl]phenol928256-41-1C18H21NO3S
- tert-Butyl (5-methyl-2-(2-oxo-2-(thiophen-3-yl)ethyl)phenyl)carbamate1262882-94-9C18H21NO3S
- 3-[4-[(2-Propan-2-ylsulfanyl-3-pyridinyl)methoxy]phenyl]propanoic acid1609286-95-4C18H21NO3S
- 2-(1,2,3,4-Tetrahydroisoquinolin-2-yl)ethyl 4-methylbenzene-1-sulfonate2757955-34-1C18H21NO3S
- 1-(3-Methyl-4-propoxybenzenesulfonyl)-2,3-dihydro-1H-indole1808822-41-4C18H21NO3S
- N-{2-Hydroxy-2-[4-(thiophen-2-yl)phenyl]ethyl}oxane-4-carboxamide2380184-16-5C18H21NO3S
- N-(4-Methylphenyl)-2-pentanoylbenzene-1-sulfonamide88312-75-8C18H21NO3S
- {3-[2-(Methylsulfanyl)ethoxy]naphthalen-2-yl}(morpholin-4-yl)methanone89574-77-6C18H21NO3S
- N-Methyl-N-[2-(4-methylbenzene-1-sulfonyl)ethyl]-2-phenylacetamide61097-94-7C18H21NO3S
- 2-(3,4-Dimethoxyphenyl)-N-{[1-(thiophen-3-yl)cyclopropyl]methyl}acetamide2549036-93-1C18H21NO3S
- N-[(4-Hydroxy-4,5,6,7-tetrahydro-1-benzothiophen-4-yl)methyl]-2-(2-methylphenoxy)acetamide2549050-51-1C18H21NO3S
- 2-(Ethylsulfanyl)-N-[(4-hydroxy-4,5,6,7-tetrahydro-1-benzofuran-4-yl)methyl]benzamide2415600-91-6C18H21NO3S
- tert-Butyl N-methyl-N-[2-oxo-1-(5-phenylthiophen-2-yl)ethyl]carbamate2228393-21-1C18H21NO3S
- tert-Butyl N-[1-oxo-2-(5-phenylthiophen-2-yl)propan-2-yl]carbamate2229336-39-2C18H21NO3S
- tert-Butyl (2E)-3-{3-[(2-methyl-1,3-thiazol-4-yl)methoxy]phenyl}prop-2-enoate2138820-48-9C18H21NO3S
- Benzyl N-{[1-(hydroxymethyl)cyclobutyl](thiophen-2-yl)methyl}carbamate2680719-35-9C18H21NO3S
- Benzyl 2-[2-hydroxy-2-(thiophen-2-yl)ethyl]pyrrolidine-1-carboxylate2680549-25-9C18H21NO3S
- tert-Butyl (2E)-3-{4-[(2-methyl-1,3-thiazol-4-yl)methoxy]phenyl}prop-2-enoate2138817-24-8C18H21NO3S
- 2-(1,2,3,4-Tetrahydroquinolin-1-yl)ethyl 4-methylbenzene-1-sulfonate2757900-35-7C18H21NO3S
Frequently asked questions
What is the molar mass of C18H21NO3S?
The molar mass of C18H21NO3S is 331.43 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 331.1242 Da.
How many compounds have the formula C18H21NO3S?
CompoundList lists 195 compounds with the molecular formula C18H21NO3S, including (3,5-Dimethoxyphenyl)(4-(thiophen-3-yl)piperidin-1-yl)methanone, 2-(2-Methoxyphenoxy)-1-(4-(thiophen-3-yl)piperidin-1-yl)ethanone, N-(2-Hydroxy-2-methyl-3-(methylthio)propyl)-4-phenoxybenzamide. 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 C18H21NO3S?
C18H21NO3S 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.