Molecular formula
C18H21N3O2S
280 compounds have this formula on CompoundList.
- Molar mass
- 343.44g/mol
- Monoisotopic mass
- 346.1543Da
- Atoms
- 45
- Elements
- 5
- Rings plus double bonds
- 10
The formula C18H21N3O2S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 2 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 × 1862.95%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.16%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 312.24%14.007 × 3 = 42.021 g/mol
- O Oxygen × 29.32%15.999 × 2 = 31.998 g/mol
- S Sulfur × 19.33%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H21N3O2S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 280 compounds
Rabeprazole-thioether
CAS 117977-21-6C18H21N3O2S
N-(5-Oxo-7-(2-thienyl)-6,7,8-trihydroquinazolin-2-yl)hexanamide
CAS 525581-30-0C18H21N3O2S
Hsp90-IN-27
CAS 525577-38-2C18H21N3O2S
![9-Methyl-4-oxo-N,N-dipropyl-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-2-carboxamide chemical structure, C18H21N3O2S, CAS 690252-19-8](/s/WVTBNGQUZWZXMG-UHFFFAOYSA-N.svg)
9-Methyl-4-oxo-N,N-dipropyl-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-2-carboxamide
CAS 690252-19-8C18H21N3O2S
![N-Butyl-N-ethyl-9-methyl-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-2-carboxamide chemical structure, C18H21N3O2S, CAS 690252-14-3](/s/CAKDQFSVKOJVCV-UHFFFAOYSA-N.svg)
N-Butyl-N-ethyl-9-methyl-4-oxo-4H-pyrido[1,2-a]thieno[2,3-d]pyrimidine-2-carboxamide
CAS 690252-14-3C18H21N3O2S
![1-(Furan-2-ylmethyl)-3-[4-(piperidine-1-carbonyl)phenyl]thiourea chemical structure, C18H21N3O2S, CAS 701284-03-9](/s/HKCHGIXSRUTEDU-UHFFFAOYSA-N.svg)
1-(Furan-2-ylmethyl)-3-[4-(piperidine-1-carbonyl)phenyl]thiourea
CAS 701284-03-9C18H21N3O2S
N-(2-Aminoethyl)-2-benzamido-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide
CAS 459419-47-7C18H21N3O2S
N~2~-(propan-2-yl)-N~3~-(pyridin-3-yl)-4,5,6,7-tetrahydro-1-benzothiophene-2,3-dicarboxamide
CAS 461436-58-8C18H21N3O2S
![N-[5-(1-Adamantyl)-1,3,4-thiadiazol-2-yl]-N-methylfuran-2-carboxamide chemical structure, C18H21N3O2S, CAS 392320-97-7](/s/ATTHGTJSCNWOML-UHFFFAOYSA-N.svg)
N-[5-(1-Adamantyl)-1,3,4-thiadiazol-2-yl]-N-methylfuran-2-carboxamide
CAS 392320-97-7C18H21N3O2S
![N-Benzyl-N-butyl-5-oxo-2,3-dihydro-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxamide chemical structure, C18H21N3O2S, CAS 497072-63-6](/s/CIDRWFZPYSLUCU-UHFFFAOYSA-N.svg)
N-Benzyl-N-butyl-5-oxo-2,3-dihydro-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxamide
CAS 497072-63-6C18H21N3O2S
![N,N-Diethyl-4-(7-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide chemical structure, C18H21N3O2S, CAS 378216-94-5](/s/BSTAOECBBDMERY-UHFFFAOYSA-N.svg)
N,N-Diethyl-4-(7-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide
CAS 378216-94-5C18H21N3O2S
![N-[5,6-Dimethyl-1-(3-methylbenzyl)-1H-1,3-benzimidazol-4-yl]methanesulfonamide chemical structure, C18H21N3O2S, CAS 338423-67-9](/s/BBKXRCHPDAVHLF-UHFFFAOYSA-N.svg)
N-[5,6-Dimethyl-1-(3-methylbenzyl)-1H-1,3-benzimidazol-4-yl]methanesulfonamide
CAS 338423-67-9C18H21N3O2S
2-((2-Hydroxyethyl)amino)-1-(5-(thiophen-2-yl)-3-(p-tolyl)-4,5-dihydro-1H-pyrazol-1-yl)ethanone
CAS 868213-35-8C18H21N3O2S
![1-[3-Methyl-4-(1-methylethyl)phenyl]-5-oxo-N-2-thiazolyl-3-pyrrolidinecarboxamide chemical structure, C18H21N3O2S, CAS 866153-54-0](/s/DZQBJMOSMBFUDG-UHFFFAOYSA-N.svg)
1-[3-Methyl-4-(1-methylethyl)phenyl]-5-oxo-N-2-thiazolyl-3-pyrrolidinecarboxamide
CAS 866153-54-0C18H21N3O2S
![2-[6-(4-Methylphenyl)pyridazin-3-yl]sulfanyl-N-(oxolan-2-ylmethyl)acetamide chemical structure, C18H21N3O2S, CAS 872694-73-0](/s/JPABLKVUUGKYLW-UHFFFAOYSA-N.svg)
2-[6-(4-Methylphenyl)pyridazin-3-yl]sulfanyl-N-(oxolan-2-ylmethyl)acetamide
CAS 872694-73-0C18H21N3O2S
![N-{4-[4-(2-Thienylcarbonyl)-1-piperazinyl]phenyl}propanamide chemical structure, C18H21N3O2S, CAS 688031-31-4](/s/OMNGODULQVBQGK-UHFFFAOYSA-N.svg)
N-{4-[4-(2-Thienylcarbonyl)-1-piperazinyl]phenyl}propanamide
CAS 688031-31-4C18H21N3O2S
![2H-Indazole-6-carboxamide, 3-ethoxy-2-ethyl-N-[2-(2-thienyl)ethyl]- chemical structure, C18H21N3O2S, CAS 919108-97-7](/s/QQJYULUXUZLTGT-UHFFFAOYSA-N.svg)
2H-Indazole-6-carboxamide, 3-ethoxy-2-ethyl-N-[2-(2-thienyl)ethyl]-
CAS 919108-97-7C18H21N3O2S
![N-[5,6-Dimethyl-1-(2-methylbenzyl)-1H-1,3-benzimidazol-4-yl]methanesulfonamide chemical structure, C18H21N3O2S, CAS 338954-71-5](/s/LUPCQHWBVTUKBT-UHFFFAOYSA-N.svg)
N-[5,6-Dimethyl-1-(2-methylbenzyl)-1H-1,3-benzimidazol-4-yl]methanesulfonamide
CAS 338954-71-5C18H21N3O2S
![N,N-Diethyl-3-(6-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide chemical structure, C18H21N3O2S, CAS 848869-34-1](/s/NZYGAFGQBWYSKZ-UHFFFAOYSA-N.svg)
N,N-Diethyl-3-(6-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide
CAS 848869-34-1C18H21N3O2S
![2-[(2-Aminophenyl)sulfanyl]-N-[4-(morpholin-4-yl)phenyl]acetamide chemical structure, C18H21N3O2S, CAS 866049-54-9](/s/SWKIEPMUTYWWOD-UHFFFAOYSA-N.svg)
2-[(2-Aminophenyl)sulfanyl]-N-[4-(morpholin-4-yl)phenyl]acetamide
CAS 866049-54-9C18H21N3O2S
4-(4-Acetylphenyl)-N-(furan-2-ylmethyl)piperazine-1-carbothioamide
CAS 706775-22-6C18H21N3O2S
![1-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-[(4-hydroxy-6-propylpyrimidin-2-yl)sulfanyl]ethanone chemical structure, C18H21N3O2S, CAS 402864-74-8](/s/ASNIBKKNCOXOEX-UHFFFAOYSA-N.svg)
1-(3,4-Dihydroisoquinolin-2(1H)-yl)-2-[(4-hydroxy-6-propylpyrimidin-2-yl)sulfanyl]ethanone
CAS 402864-74-8C18H21N3O2S
3-(2-Methylpropoxy)-N-(pyridin-3-ylmethylcarbamothioyl)benzamide
CAS 693256-33-6C18H21N3O2S
methanone chemical structure, C18H21N3O2S, CAS 860650-50-6](/s/VSFDMARLKYYWMU-UHFFFAOYSA-N.svg)
[4-(2-Hydroxyethyl)piperazino](8-methyl-8H-thieno[2,3-b]indol-2-yl)methanone
CAS 860650-50-6C18H21N3O2S
- N-(3,5-Dimethylphenyl)-4-(furan-2-carbonyl)piperazine-1-carbothioamide433256-20-3C18H21N3O2S
- N-Cyclopentyl-2-((6-(3-methoxyphenyl)pyridazin-3-yl)thio)acetamide893986-60-2C18H21N3O2S
- 1-[(E)-1-(4-Methoxyphenyl)ethylideneamino]-3-[(4-methoxyphenyl)methyl]thiourea321905-85-5C18H21N3O2S
- (E)-4-(tert-Butyl)-N-(2-oxo-2-(2-(thiophen-2-ylmethylene)hydrazinyl)ethyl)benzamide391877-87-5C18H21N3O2S
- N-(1-tert-Butylbenzimidazol-5-yl)-4-methylbenzenesulfonamide292052-61-0C18H21N3O2S
- 1-Benzyl-N'-(thiophene-2-carbonyl)piperidine-4-carbohydrazide478064-42-5C18H21N3O2S
- Butyl N-[4,6-dimethyl-3-(1H-pyrrol-1-yl)thieno[2,3-b]pyridin-2-yl]carbamate334968-16-0C18H21N3O2S
- N-(2,2-Diethoxyethyl)-6-phenylthieno[2,3-d]pyrimidin-4-amine851113-49-0C18H21N3O2S
- N-Cyclopentyl-2-[6-(4-methoxyphenyl)pyridazin-3-yl]sulfanylacetamide893994-66-6C18H21N3O2S
- 4-(Benzyloxy)-3-methoxybenzaldehyde N-ethylthiosemicarbazone301811-73-4C18H21N3O2S
- N-[2-(3,4-Dimethoxyphenyl)ethyl]-5,6-dimethylthieno[2,3-d]pyrimidin-4-amine315682-73-6C18H21N3O2S
- N-(3-Carbamoyl-6-propyl-4,5,6,7-tetrahydro-1-benzothiophen-2-yl)pyridine-4-carboxamide389079-10-1C18H21N3O2S
- 3-Allyl-2-((2-oxo-2-(piperidin-1-yl)ethyl)thio)quinazolin-4(3H)-one384358-91-2C18H21N3O2S
- N-Cyclopentyl-2-[6-(2-methoxyphenyl)pyridazin-3-yl]sulfanylacetamide893977-88-3C18H21N3O2S
- 2-(4-Hydroxy-6-propylpyrimidin-2-ylthio)-N-indan-2-ylacetamide883007-70-3C18H21N3O2S
- (Z)-N-(2-(tert-Butyl)-5-oxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)-3-phenylacrylamide1007194-48-0C18H21N3O2S
- 2-[5-(Propan-2-yl)-1-benzofuran-3-yl]-N-(5-propyl-1,3,4-thiadiazol-2-yl)acetamide879942-07-1C18H21N3O2S
- 2-(4,6-Dimethyl-1-benzofuran-3-yl)-N-[5-(2-methylpropyl)-1,3,4-thiadiazol-2-yl]acetamide873080-68-3C18H21N3O2S
- N-(5-Oxido-2-(p-tolyl)-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)cyclopentanecarboxamide958132-53-1C18H21N3O2S
- N-[(4-Methylphenyl)methyl]-2-[(2-oxo-5,6,7,8-tetrahydro-1H-quinazolin-4-yl)sulfanyl]acetamide959535-33-2C18H21N3O2S
- N-(sec-Butyl)-6-(4-methoxyphenyl)-3-methylimidazo[2,1-b]thiazole-2-carboxamide852134-70-4C18H21N3O2S
- 1-(1-(3,4-Dimethylphenyl)-5-oxopyrrolidin-3-yl)-3-(thiophen-2-ylmethyl)urea891093-12-2C18H21N3O2S
- 1-Isobutoxy-8,8-dimethyl-8,9-dihydro-6H-7-oxa-11-thia-2,4,10-triaza-benzo[b]fluorene384794-44-9C18H21N3O2S
- 3-(Benzo[d][1,3]dioxol-5-yl)-6-((2-(piperidin-1-yl)ethyl)thio)pyridazine899968-55-9C18H21N3O2S
- 2-[5-(Propan-2-yl)-1-benzofuran-3-yl]-N-[5-(propan-2-yl)-1,3,4-thiadiazol-2-yl]acetamide879933-04-7C18H21N3O2S
- 6-(2-(Cyclohex-1-en-1-yl)ethyl)-4-(thiophen-2-yl)-3,4,6,7-tetrahydro-1H-pyrrolo[3,4-d]pyrimidine-2,5-dione946325-49-1C18H21N3O2S
- N-[3-(Methylsulfanyl)phenyl]-2-(3-oxo-3,5,6,7,8,9-hexahydro-2H-cyclohepta[c]pyridazin-2-yl)acetamide1282114-24-2C18H21N3O2S
- N-Butyl-6-(4-methoxyphenyl)-3-methylimidazo[2,1-b][1,3]thiazole-2-carboxamide852134-67-9C18H21N3O2S
- 1-(4-(5-Cyclopropyl-1,3,4-thiadiazol-2-yl)piperidin-1-yl)-2-phenoxyethanone1105203-92-6C18H21N3O2S
- (E)-5-(2-(Allyloxy)benzylidene)-2-(4-methylpiperazin-1-yl)thiazol-4(5H)-one848669-73-8C18H21N3O2S
- Cyclopropyl(4-(5-(2-methoxyphenyl)-1,3,4-thiadiazol-2-yl)piperidin-1-yl)methanone1171095-95-6C18H21N3O2S
- 7-Ethyl-8-methyl-6-oxo-N-(o-tolyl)-2,3,4,6-tetrahydropyrimido[2,1-b][1,3]thiazine-3-carboxamide1396862-13-7C18H21N3O2S
- 3-Amino-N-cyclohexyl-5-oxo-5,6,7,8-tetrahydrothieno[2,3-b]quinoline-2-carboxamide442557-68-8C18H21N3O2S
- 1-(Benzenesulfonyl)-4-piperazin-1-yl-2,3-dihydroindole1884320-87-9C18H21N3O2S
- 2-(2-Ethoxyphenyl)-7-methyl-2,3,5,6,7,8-hexahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidin-4(1H)-one321529-57-1C18H21N3O2S
- N-(2,4-Dimethylphenyl)-4-(furan-2-carbonyl)piperazine-1-carbothioamide433307-60-9C18H21N3O2S
- 2-(2-Methylpropanoylamino)-N-pyridin-3-yl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxamide342382-30-3C18H21N3O2S
- 1-Butyl-2-(3-nitrophenyl)-5,6,7,8-tetrahydroquinazoline-4-thione462069-11-0C18H21N3O2S
- 3-Butyl-8,8-dimethyl-7,10-dihydro-8H-pyrano[3'',4'':5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidin-4(3H)-one380904-43-8C18H21N3O2S
- N,N-Diethyl-4-(8-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide380879-04-9C18H21N3O2S
- 1-(5-(Furan-2-yl)-3-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-1-yl)-2-(piperidin-1-yl)ethanone876941-57-0C18H21N3O2S
- 1-Isobutyl-2-(3-nitrophenyl)-5,6,7,8-tetrahydroquinazoline-4(1H)-thione433941-41-4C18H21N3O2S
- N,N-Diethyl-4-(6-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide381695-65-4C18H21N3O2S
- 5-Ethoxy-4-ethyl-2-(5-methyl-4-(4-methylthiazol-2-yl)-1H-pyrazol-3-yl)phenol879440-87-6C18H21N3O2S
- N-(5,5-Dimethyl-7-oxo-4,5,6,7-tetrahydrobenzo[d]thiazol-2-yl)-4-(dimethylamino)benzamide361168-05-0C18H21N3O2S
- 1-(1-Propanoyl-1,2,3,4-tetrahydroquinolin-7-yl)-3-[(thiophen-2-yl)methyl]urea1203186-07-5C18H21N3O2S
- 1-Isobutyl-2-(4-nitrophenyl)-5,6,7,8-tetrahydroquinazoline-4(1H)-thione433690-72-3C18H21N3O2S
- 3,5,6-Trimethyl-N-[5-(2-methylpropyl)-1,3,4-thiadiazol-2-yl]-1-benzofuran-2-carboxamide622349-92-2C18H21N3O2S
- 4-(2-Anilino-2-oxoethyl)sulfanyl-N-(pyridin-3-ylmethyl)butanamide543694-28-6C18H21N3O2S
- 4-(Furan-2-ylcarbonyl)-N-(2-phenylethyl)piperazine-1-carbothioamide433259-82-6C18H21N3O2S
- 1-Butyl-2-(4-nitrophenyl)-5,6,7,8-tetrahydroquinazoline-4-thione462069-10-9C18H21N3O2S
- (Z)-N-(3-((2-(Dimethylamino)ethyl)amino)-3-oxo-1-(thiophen-2-yl)prop-1-en-2-yl)benzamide402472-08-6C18H21N3O2S
- 2-[6-(4-Ethoxyphenyl)pyridazin-3-yl]sulfanyl-1-pyrrolidin-1-ylethanone872689-19-5C18H21N3O2S
- 2-(4-(Dimethylamino)benzamido)-N-methyl-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxamide893099-59-7C18H21N3O2S
- 2-(1H-Benzimidazol-2-ylsulfanyl)-1-[1-(2-methoxyethyl)-2,5-dimethyl-1H-pyrrol-3-yl]ethanone871922-11-1C18H21N3O2S
- N,N-Diethyl-3-(7-methylimidazo[1,2-a]pyridin-2-yl)benzenesulfonamide720671-15-8C18H21N3O2S
- N-{[4-(Dimethylamino)phenyl]carbamothioyl}-4-ethoxybenzamide429621-29-4C18H21N3O2S
- 1-(3-Methoxypropyl)-3-[(4-phenylbenzoyl)amino]thiourea701932-51-6C18H21N3O2S
- N-[(1-Benzylpiperidin-4-yl)carbamothioyl]furan-2-carboxamide438033-41-1C18H21N3O2S
- 2-[6-(4-Methoxyphenyl)pyridazin-3-yl]sulfanyl-1-piperidin-1-ylethanone626222-45-5C18H21N3O2S
- 4-Ethyl-N-(2-(7-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide868978-94-3C18H21N3O2S
- 2,4-Dimethyl-N-(2-(8-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide868979-02-6C18H21N3O2S
- 2-(4-Ethoxyphenyl)-7-methyl-2,3,5,6,7,8-hexahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidin-4(1H)-one420107-26-2C18H21N3O2S
- 2,4-Dimethyl-N-(2-(7-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide868978-77-2C18H21N3O2S
- 2-[6-(3-Methoxyphenyl)pyridazin-3-yl]sulfanyl-1-piperidin-1-ylethanone872695-25-5C18H21N3O2S
- Cyclohex-3-en-1-yl(4-(5-(thiophen-3-yl)-1,3,4-oxadiazol-2-yl)piperidin-1-yl)methanone1448076-80-9C18H21N3O2S
- (2-(Ethylthio)phenyl)(4-(pyrazin-2-yloxy)piperidin-1-yl)methanone1448137-24-3C18H21N3O2S
- 4-(2-(4-(Thiophen-2-yl)piperidin-1-yl)acetamido)benzamide1396858-46-0C18H21N3O2S
- N-Cyclopentyl-2-[(4-hydroxy-6-methylpyrimidin-2-yl)sulfanyl]-2-phenylacetamide936821-00-0C18H21N3O2S
- 4-Isothiazolecarboxamide, 5-benzamido-N-cyclohexyl-3-methyl-24001-25-0C18H21N3O2S
- 2-(4-(Dimethylamino)benzamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxamide392249-55-7C18H21N3O2S
- 4-Butoxy-N-(pyridin-3-ylmethylcarbamothioyl)benzamide426221-26-3C18H21N3O2S
- (E)-5-(4-(Allyloxy)benzylidene)-2-(4-methylpiperazin-1-yl)thiazol-4(5H)-one844822-51-1C18H21N3O2S
- 4-Ethyl-N-(2-(8-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide868979-18-4C18H21N3O2S
- N-(2-(Imidazo[1,2-a]pyridin-2-yl)ethyl)-2,4,6-trimethylbenzenesulfonamide868978-57-8C18H21N3O2S
- N-Mesityl-2-((2-oxo-2,5,6,7-tetrahydro-1H-cyclopenta[d]pyrimidin-4-yl)thio)acetamide933203-44-2C18H21N3O2S
Frequently asked questions
What is the molar mass of C18H21N3O2S?
The molar mass of C18H21N3O2S is 343.44 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 2 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 346.1543 Da.
How many compounds have the formula C18H21N3O2S?
CompoundList lists 280 compounds with the molecular formula C18H21N3O2S, including Rabeprazole-thioether, N-(5-Oxo-7-(2-thienyl)-6,7,8-trihydroquinazolin-2-yl)hexanamide, Hsp90-IN-27. 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 C18H21N3O2S?
C18H21N3O2S 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.