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 1 to 100 of 195 compounds
1-(2-Methoxy-4,5-dimethyl-benzenesulfonyl)-1,2,3,4-tetrahydro-quinoline
CAS 496015-55-5C18H21NO3S
1-Benzhydryl-3-methylazetidin-3-yl methanesulfonate
CAS 133891-87-9C18H21NO3S
4-(4-Methylphenyl)-N-(oxolan-2-ylmethyl)benzenesulfonamide
CAS 667912-46-1C18H21NO3S
N-(4-Acetylphenyl)-4-tert-butylbenzenesulfonamide
CAS 690643-29-9C18H21NO3S
![Ethyl 2-[(2,2-dimethylpropanoyl)amino]-5-phenylthiophene-3-carboxylate chemical structure, C18H21NO3S, CAS 307536-35-2](/s/ASZAIMWKUMRMNW-UHFFFAOYSA-N.svg)
Ethyl 2-[(2,2-dimethylpropanoyl)amino]-5-phenylthiophene-3-carboxylate
CAS 307536-35-2C18H21NO3S
Methyl 2,7,7-trimethyl-5-oxo-4-(thiophen-3-yl)-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate
CAS 330208-61-2C18H21NO3S
(2-Amino-6-methyl-4,5,6,7-tetrahydro-1-benzothien-3-yl)(2,3-dimethoxyphenyl)methanone
CAS 793678-83-8C18H21NO3S
N-(5-tert-Butyl-2-methylphenyl)sulfonylbenzamide
CAS 708996-79-6C18H21NO3S
![2-Methoxy-N-[2-(4-methoxyphenyl)ethyl]-4-methylsulfanylbenzamide chemical structure, C18H21NO3S, CAS 349576-19-8](/s/HLZDVCUOAHOSFR-UHFFFAOYSA-N.svg)
2-Methoxy-N-[2-(4-methoxyphenyl)ethyl]-4-methylsulfanylbenzamide
CAS 349576-19-8C18H21NO3S
![N-[[4-(4-Methoxyphenyl)oxan-4-yl]methyl]thiophene-2-carboxamide chemical structure, C18H21NO3S, CAS 714209-75-3](/s/DGEFKOUOOBGQNY-UHFFFAOYSA-N.svg)
N-[[4-(4-Methoxyphenyl)oxan-4-yl]methyl]thiophene-2-carboxamide
CAS 714209-75-3C18H21NO3S
3-Methyl-N-(2,2,4-trimethyl-2,3-dihydro-1-benzofuran-7-yl)benzenesulfonamide
CAS 866042-47-9C18H21NO3S
![Ethyl 2-(3-formyl-2,5-dimethyl-1H-pyrrol-1-yl)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate chemical structure, C18H21NO3S, CAS 340319-61-1](/s/IWAQYICUTFQLPL-UHFFFAOYSA-N.svg)
Ethyl 2-(3-formyl-2,5-dimethyl-1H-pyrrol-1-yl)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate
CAS 340319-61-1C18H21NO3S
3-(Benzylsulfonyl)-N-(2-phenylethyl)propanamide
CAS 827620-40-6C18H21NO3S
(2-Amino-6-methyl-4,5,6,7-tetrahydro-1-benzothien-3-yl)(3,5-dimethoxyphenyl)methanone
CAS 793716-17-3C18H21NO3S
Ethyl 2-(3-methylbutanoylamino)-5-phenylthiophene-3-carboxylate
CAS 380645-74-9C18H21NO3S
![4,6-Dimethyl-3-[(4-methylphenyl)sulfonyl]-1-(2-methyl-2-propenyl)-2(1H)-pyridinone chemical structure, C18H21NO3S, CAS 866051-46-9](/s/VSOZBRCUSSEVMA-UHFFFAOYSA-N.svg)
4,6-Dimethyl-3-[(4-methylphenyl)sulfonyl]-1-(2-methyl-2-propenyl)-2(1H)-pyridinone
CAS 866051-46-9C18H21NO3S
![4,6-Dimethyl-3-[(3-methylphenyl)sulfonyl]-1-(2-methyl-2-propenyl)-2(1H)-pyridinone chemical structure, C18H21NO3S, CAS 866051-49-2](/s/LGIXJMUHEJXWQK-UHFFFAOYSA-N.svg)
4,6-Dimethyl-3-[(3-methylphenyl)sulfonyl]-1-(2-methyl-2-propenyl)-2(1H)-pyridinone
CAS 866051-49-2C18H21NO3S
![4,6-Dimethyl-3-[(2-methylphenyl)sulfonyl]-1-(2-methyl-2-propenyl)-2(1H)-pyridinone chemical structure, C18H21NO3S, CAS 477864-60-1](/s/NCHUOHWFLDMFNZ-UHFFFAOYSA-N.svg)
4,6-Dimethyl-3-[(2-methylphenyl)sulfonyl]-1-(2-methyl-2-propenyl)-2(1H)-pyridinone
CAS 477864-60-1C18H21NO3S
![[2-[Benzyl(propan-2-yl)amino]-2-oxoethyl] 3-methylthiophene-2-carboxylate chemical structure, C18H21NO3S, CAS 730254-32-7](/s/NBDYNSGAEJXKQB-UHFFFAOYSA-N.svg)
[2-[Benzyl(propan-2-yl)amino]-2-oxoethyl] 3-methylthiophene-2-carboxylate
CAS 730254-32-7C18H21NO3S
![N-[(4-Methoxyphenyl)methyl]-4-thiophen-2-yloxane-4-carboxamide chemical structure, C18H21NO3S, CAS 877650-50-5](/s/ZFHCVMUGCDKRPU-UHFFFAOYSA-N.svg)
N-[(4-Methoxyphenyl)methyl]-4-thiophen-2-yloxane-4-carboxamide
CAS 877650-50-5C18H21NO3S
3-(1,1,2-Trimethyl-1H-benzo(e)indol-3-ium-3-yl)propane-1-sulfonate
CAS 63666-10-4C18H21NO3S
2-(2-Methoxy-4,5-dimethylphenyl)sulfonyl-3,4-dihydro-1H-isoquinoline
CAS 496015-57-7C18H21NO3S
N-(3-Methoxybenzyl)-4-(thiophen-2-yl)tetrahydro-2H-pyran-4-carboxamide
CAS 877651-00-8C18H21NO3S
N-(2-Methoxybenzyl)-4-(thiophen-2-yl)tetrahydro-2H-pyran-4-carboxamide
CAS 877651-26-8C18H21NO3S
- Methyl 3-{[4-(tert-butyl)benzoyl]amino}-4-methyl-2-thiophenecarboxylate676318-52-8C18H21NO3S
- 2-Methyl-1-(4-phenoxyphenyl)sulfonylpiperidine670272-12-5C18H21NO3S
- 4-(tert-Butyl)-N-(4-(methylsulfonyl)phenyl)benzamide920186-61-4C18H21NO3S
- N-(3,4-Dimethoxyphenyl)-1-(thiophen-2-yl)cyclopentane-1-carboxamide1049514-30-8C18H21NO3S
- N-(3,5-Dimethylphenyl)-3-tosylpropanamide895451-29-3C18H21NO3S
- N-(2,4-Dimethoxyphenyl)-1-(thiophen-2-yl)cyclopentanecarboxamide1049525-45-2C18H21NO3S
- (1-Benzhydrylazetidin-3-yl)methyl methanesulfonate162698-41-1C18H21NO3S
- (S)-1-Benzyl-3-[(P-tolylsulfonyl)oxy]pyrrolidine116183-79-0C18H21NO3S
- Ethyl 4-phenyl-2-pivalamidothiophene-3-carboxylate72965-25-4C18H21NO3S
- 2-[(4-tert-Butylbenzoyl)amino]-4,5-dimethyl-3-thiophenecarboxylic acid342594-84-7C18H21NO3S
- 1-[(4-Ethoxy-3-methylphenyl)sulfonyl]-2-methylindoline825608-65-9C18H21NO3S
- 1-Benzylpyrrolidin-3-yl 4-methylbenzenesulfonate26055-95-8C18H21NO3S
- Toluene-4-sulfonic acid (R)-1-benzyl-pyrrolidin-3-yl ester116183-80-3C18H21NO3S
- 1-((3-Ethyl-4-methoxyphenyl)sulfonyl)-2-methylindoline873588-38-6C18H21NO3S
- 2-((4-Methoxy-2,5-dimethylphenyl)sulfonyl)-1,2,3,4-tetrahydroisoquinoline667892-81-1C18H21NO3S
- 2-[(4-Methoxy-2,3-dimethylphenyl)sulfonyl]-1,2,3,4-tetrahydroisoquinoline799265-83-1C18H21NO3S
- Methyl 4-ethyl-5-methyl-2-(3-phenylpropanoylamino)thiophene-3-carboxylate418785-71-4C18H21NO3S
- N-(3-Acetylphenyl)-4-(tert-butyl)benzenesulfonamide338966-24-8C18H21NO3S
- 2-(4-Methoxyphenyl)-1-tosylpyrrolidine298689-85-7C18H21NO3S
- Carbamic acid, methyl((2-methylphenyl)thio)-, o-isopropoxyphenyl ester50539-85-0C18H21NO3S
- 2-(5-Methoxy-2,4-dimethyl-benzenesulfonyl)-1,2,3,4-tetrahydro-isoquinoline694472-44-1C18H21NO3S
- 2-[(4-tert-Butylbenzoyl)amino]-5-ethylthiophene-3-carboxylic acid461439-35-0C18H21NO3S
- Methyl 2-[(4-isopropylbenzoyl)amino]-4,5-dimethyl-3-thiophenecarboxylate543707-17-1C18H21NO3S
- 2-((4-Ethoxy-3-methylphenyl)sulfonyl)-1,2,3,4-tetrahydroisoquinoline868143-14-0C18H21NO3S
- Isopropyl 4,5-dimethyl-2-[(4-methylbenzoyl)amino]-3-thiophenecarboxylate541544-77-8C18H21NO3S
- 1-[(2-Ethoxy-5-methylphenyl)sulfonyl]-2-methylindoline791844-38-7C18H21NO3S
- N-{[4-(2-Methoxyphenyl)oxan-4-yl]methyl}thiophene-2-carboxamide1091020-95-9C18H21NO3S
- 1-Methylpiperidin-3-yl hydroxy(phenyl)(thiophen-2-yl)acetate63917-18-0C18H21NO3S
- 4-Phenyl-1-(p-tolylsulphonyl)piperidin-4-ol83863-40-5C18H21NO3S
- Methyl 2-[(3,4-dimethylbenzoyl)amino]-5-isopropylthiophene-3-carboxylate444999-25-1C18H21NO3S
- N-[(4-Phenyloxan-4-yl)methyl]benzenesulfonamide700857-56-3C18H21NO3S
- 1-(4-Methoxy-2,5-dimethylbenzenesulfonyl)-2-methyl-2,3-dihydro-1H-indole708222-68-8C18H21NO3S
- {[4-(Butan-2-yl)phenyl]amino}[(4-methylphenyl)sulfonyl]methanone355818-31-4C18H21NO3S
- Carbamic acid, methyl((4-methylphenyl)thio)-, 2-(1-methylethoxy)phenyl ester50539-83-8C18H21NO3S
- Carbamic acid, methyl((3-methylphenyl)thio)-, 2-(1-methylethoxy)phenyl ester50539-84-9C18H21NO3S
- 1-(2,4,6-Trimethylbenzenesulfonyl)-1,2,3,4-tetrahydroquinolin-8-ol385407-71-6C18H21NO3S
- Methyl 3-(4-isopropylphenyl)-3-[(2-thienylcarbonyl)amino]propanoate477858-90-5C18H21NO3S
- 4-(Phenethylsulfonyl)-2-phenylmorpholine953986-32-8C18H21NO3S
- 2-Phenoxy-N-((4-(thiophen-2-yl)tetrahydro-2H-pyran-4-yl)methyl)acetamide1202998-21-7C18H21NO3S
- 2-((2,2-Dimethyl-2,3-dihydrobenzofuran-7-yl)oxy)-N-(2-(thiophen-3-yl)ethyl)acetamide1324695-81-9C18H21NO3S
- 1-(Benzylsulfonyl)-3-(4-methoxyphenyl)pyrrolidine1351612-96-8C18H21NO3S
- N-Cyclopropyl-2-(3-methoxyphenoxy)-N-(2-(thiophen-2-yl)ethyl)acetamide1396793-52-4C18H21NO3S
- 2-(Benzylthio)-N-(2-cyclopropyl-2-(furan-2-yl)-2-hydroxyethyl)acetamide1396793-86-4C18H21NO3S
- 2-(2-Methoxyphenoxy)-1-(4-(thiophen-2-yl)piperidin-1-yl)ethanone1396878-24-2C18H21NO3S
- 1-(Furan-2-carbonyl)-4-{[(4-methoxyphenyl)sulfanyl]methyl}piperidine1421477-51-1C18H21NO3S
- Carbamic acid, methyl((phenylmethoxy)thio)-, 3-(1-methylethyl)phenyl ester86627-72-7C18H21NO3S
- Ethyl 2-[(2-hydroxy-4-methylphenyl)methylamino]-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate380644-26-8C18H21NO3S
- Ethyl 2-[(2-hydroxy-5-methylphenyl)methylamino]-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate380644-27-9C18H21NO3S
- Methyl 2-[(3,4-dimethylbenzoyl)amino]-4-ethyl-5-methylthiophene-3-carboxylate303138-54-7C18H21NO3S
- 2-(4-Methylphenyl)-N-(2-((4-methylphenyl)sulfonyl)ethyl)acetamide477886-01-4C18H21NO3S
- Propyl 4,5-dimethyl-2-[(3-methylbenzoyl)amino]thiophene-3-carboxylate445013-19-4C18H21NO3S
- N-(3,4-Dimethoxyphenyl)-2-(4-methylphenyl)sulfanylpropanamide693815-30-4C18H21NO3S
- Ethyl 2-[(3-methylbenzoyl)amino]-5-propan-2-ylthiophene-3-carboxylate445008-81-1C18H21NO3S
- 3,4-Dimethoxy-N-(4,5,6,7-tetrahydro-1-benzothien-3-ylmethyl)benzamide893775-24-1C18H21NO3S
- N-[1-(3,4-Dimethoxyphenyl)ethyl]-2-phenylsulfanylacetamide894647-19-9C18H21NO3S
- 1-[(5-Methoxy-2,4-dimethylphenyl)sulfonyl]-2-methylindoline873579-80-7C18H21NO3S
- N-Benzyl-4-tosylbutanamide922984-75-6C18H21NO3S
- 4-(tert-Butyl)-N-(2-(methylsulfonyl)phenyl)benzamide920393-81-3C18H21NO3S
- 2-Methyl-4-[4-(piperidin-1-ylsulfonyl)phenyl]phenol1261917-88-7C18H21NO3S
- 2-Methyl-5-[4-(piperidin-1-ylsulfonyl)phenyl]phenol1261917-89-8C18H21NO3S
- 3-Methyl-5-[4-(piperidin-1-ylsulfonyl)phenyl]phenol1261960-92-2C18H21NO3S
- N-((1S,2R)-2-Hydroxy-2,3-dihydro-1H-inden-1-yl)-2,4,6-trimethylbenzenesulfonamide473554-01-7C18H21NO3S
- (3-(Isobutylsulfonyl)azetidin-1-yl)(naphthalen-1-yl)methanone1797316-65-4C18H21NO3S
- 2-(6,7-Dimethoxynaphthalen-2-yl)-1-(morpholin-4-yl)ethanethione37707-81-6C18H21NO3S
- Methyl 2-(2,2-dimethylpropanoylamino)-5-methyl-4-phenylthiophene-3-carboxylate692743-41-2C18H21NO3S
- Ethyl 2-isobutyramido-4-(p-tolyl)thiophene-3-carboxylate372975-32-1C18H21NO3S
- 4-((4-Ethylphenyl)sulfonyl)-2-phenylmorpholine953958-97-9C18H21NO3S
- N-(2,5-Dimethylphenyl)-4-(isopropylsulfonyl)benzamide919756-06-2C18H21NO3S
- N-Benzyl-4-(benzylsulfonyl)butanamide923413-65-4C18H21NO3S
- 4-(Benzylsulfonyl)-N-methyl-N-phenylbutanamide923457-82-3C18H21NO3S
- N-(2,5-Dimethoxyphenyl)-1-(thiophen-2-yl)cyclopentane-1-carboxamide1049573-77-4C18H21NO3S
- N-((4-(2-Methoxyphenyl)tetrahydro-2H-pyran-4-yl)methyl)thiophene-3-carboxamide1207030-21-4C18H21NO3S
- 1-((4-Methoxy-2-methylphenyl)sulfonyl)-3-phenylpyrrolidine1207018-82-3C18H21NO3S
- N-(2-Cyclopropyl-2-(furan-2-yl)-2-hydroxyethyl)-3-(phenylthio)propanamide1396867-17-6C18H21NO3S
- N-((1-Hydroxy-2,3-dihydro-1H-inden-1-yl)methyl)-1-(m-tolyl)methanesulfonamide1396873-93-0C18H21NO3S
- (2,3-Dimethoxyphenyl)(4-(thiophen-2-yl)piperidin-1-yl)methanone1396716-00-9C18H21NO3S
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 1-(2-Methoxy-4,5-dimethyl-benzenesulfonyl)-1,2,3,4-tetrahydro-quinoline, 1-Benzhydryl-3-methylazetidin-3-yl methanesulfonate, 4-(4-Methylphenyl)-N-(oxolan-2-ylmethyl)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 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.