Molecular formula
C18H21N3O3S2
77 compounds have this formula on CompoundList.
- Molar mass
- 391.50g/mol
- Monoisotopic mass
- 391.1024Da
- Atoms
- 47
- Elements
- 5
- Rings plus double bonds
- 10
The formula C18H21N3O3S2 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 2 sulfur atoms. 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 × 1855.22%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 215.41%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 310.73%14.007 × 3 = 42.021 g/mol
- O Oxygen × 312.26%15.999 × 3 = 47.997 g/mol
- S Sulfur × 216.38%32.06 × 2 = 64.120 g/mol
Look up another formula
Compounds with the formula C18H21N3O3S2
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 77 of 77 compounds
![2-((3,6-Dimethyl-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(2-ethoxyphenyl)acetamide chemical structure, C18H21N3O3S2, CAS 689262-55-3](/s/BYHXVXJXTHYPSH-UHFFFAOYSA-N.svg)
2-((3,6-Dimethyl-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(2-ethoxyphenyl)acetamide
CAS 689262-55-3C18H21N3O3S2
![2-[(3,6-Dimethyl-4-oxo-6,7-dihydrothieno[3,2-d]pyrimidin-2-yl)sulfanyl]-N-(4-ethoxyphenyl)acetamide chemical structure, C18H21N3O3S2, CAS 688353-33-5](/s/SFHXNTMJJBVWLW-UHFFFAOYSA-N.svg)
2-[(3,6-Dimethyl-4-oxo-6,7-dihydrothieno[3,2-d]pyrimidin-2-yl)sulfanyl]-N-(4-ethoxyphenyl)acetamide
CAS 688353-33-5C18H21N3O3S2
1-(2-(Dimethylamino)ethyl)-4-(2,4-dimethylthiazole-5-carbonyl)-3-hydroxy-5-(thiophen-2-yl)-1H-pyrrol-2(5H)-one
CAS 627817-04-3C18H21N3O3S2
![(5Z)-5-(4-Methoxybenzylidene)-3-[2-(4-methylpiperazin-1-yl)-2-oxoethyl]-2-thioxo-1,3-thiazolidin-4-one chemical structure, C18H21N3O3S2, CAS 306323-15-9](/s/PEDVBHVKYJECBY-PTNGSMBKSA-N.svg)
(5Z)-5-(4-Methoxybenzylidene)-3-[2-(4-methylpiperazin-1-yl)-2-oxoethyl]-2-thioxo-1,3-thiazolidin-4-one
CAS 306323-15-9C18H21N3O3S2
![N-{4-[1-(2-Methylpropanoyl)-5-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-3-yl]phenyl}methanesulfonamide chemical structure, C18H21N3O3S2, CAS 851718-29-1](/s/HOQXRZZCFFFHDY-UHFFFAOYSA-N.svg)
N-{4-[1-(2-Methylpropanoyl)-5-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-3-yl]phenyl}methanesulfonamide
CAS 851718-29-1C18H21N3O3S2
2-Methylsulfanyl-N-(3-piperidin-1-ylsulfonylphenyl)pyridine-3-carboxamide
CAS 804489-70-1C18H21N3O3S2
![1-(4-Methylbenzenesulfonyl)-4-[2-(methylsulfanyl)pyridine-3-carbonyl]piperazine chemical structure, C18H21N3O3S2, CAS 880418-22-4](/s/KOSTZLAWUQKHSC-UHFFFAOYSA-N.svg)
1-(4-Methylbenzenesulfonyl)-4-[2-(methylsulfanyl)pyridine-3-carbonyl]piperazine
CAS 880418-22-4C18H21N3O3S2
![3-Allyl-2-((2-morpholino-2-oxoethyl)thio)-6,7-dihydro-3H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4(5H)-one chemical structure, C18H21N3O3S2, CAS 325693-29-6](/s/LOOHWRCLAYRLCT-UHFFFAOYSA-N.svg)
3-Allyl-2-((2-morpholino-2-oxoethyl)thio)-6,7-dihydro-3H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4(5H)-one
CAS 325693-29-6C18H21N3O3S2
![Methyl 3-[4-amino-5-(cyclopentylcarbamoyl)-2-sulfanylidene-2,3-dihydro-1,3-thiazol-3-yl]-4-methylbenzoate chemical structure, C18H21N3O3S2, CAS 1021252-94-7](/s/BSGMSBQPHXLNBR-UHFFFAOYSA-N.svg)
Methyl 3-[4-amino-5-(cyclopentylcarbamoyl)-2-sulfanylidene-2,3-dihydro-1,3-thiazol-3-yl]-4-methylbenzoate
CAS 1021252-94-7C18H21N3O3S2
![N-(4,5-Dihydronaphtho[1,2-d]thiazol-2-yl)-1-(methylsulfonyl)piperidine-3-carboxamide chemical structure, C18H21N3O3S2, CAS 1060164-75-1](/s/QQTKRBDFOKKIFW-UHFFFAOYSA-N.svg)
N-(4,5-Dihydronaphtho[1,2-d]thiazol-2-yl)-1-(methylsulfonyl)piperidine-3-carboxamide
CAS 1060164-75-1C18H21N3O3S2
1-(2-((1,2-Dimethyl-1H-indol-3-yl)sulfonyl)ethyl)-3-(thiophen-2-ylmethyl)urea
CAS 946291-63-0C18H21N3O3S2
![Methyl 3-[4-amino-5-(piperidine-1-carbonyl)-2-sulfanylidene-2,3-dihydro-1,3-thiazol-3-yl]-4-methylbenzoate chemical structure, C18H21N3O3S2, CAS 1021252-89-0](/s/AOZVXISWCLPIEO-UHFFFAOYSA-N.svg)
Methyl 3-[4-amino-5-(piperidine-1-carbonyl)-2-sulfanylidene-2,3-dihydro-1,3-thiazol-3-yl]-4-methylbenzoate
CAS 1021252-89-0C18H21N3O3S2
Methyl 3-(4-amino-5-(azepane-1-carbonyl)-2-thioxothiazol-3(2H)-yl)benzoate
CAS 946295-74-5C18H21N3O3S2
![Ethyl 2-(2-((4,6-dimethylpyrimidin-2-yl)thio)acetamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate chemical structure, C18H21N3O3S2, CAS 330555-57-2](/s/LGNHRIBQFHHMCI-UHFFFAOYSA-N.svg)
Ethyl 2-(2-((4,6-dimethylpyrimidin-2-yl)thio)acetamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate
CAS 330555-57-2C18H21N3O3S2
![4-tert-Butyl-N-[(4-sulfamoylphenyl)carbamothioyl]benzamide chemical structure, C18H21N3O3S2, CAS 501111-61-1](/s/PXVGHIKLKYYWIQ-UHFFFAOYSA-N.svg)
4-tert-Butyl-N-[(4-sulfamoylphenyl)carbamothioyl]benzamide
CAS 501111-61-1C18H21N3O3S2
![Ethyl 2-[[2-(4-methylpyrimidin-2-yl)sulfanylacetyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate chemical structure, C18H21N3O3S2, CAS 585555-13-1](/s/UNRLJUACVJPXGT-UHFFFAOYSA-N.svg)
Ethyl 2-[[2-(4-methylpyrimidin-2-yl)sulfanylacetyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate
CAS 585555-13-1C18H21N3O3S2
(E)-4-(Azepan-1-ylsulfonyl)-N'-(thiophen-2-ylmethylene)benzohydrazide
CAS 326007-47-0C18H21N3O3S2
![Ethyl 7-methyl-4-oxo-2-(propylsulfanyl)-5-(thiophen-2-yl)-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-6-carboxylate chemical structure, C18H21N3O3S2, CAS 878123-22-9](/s/WGIKLMKMUFLDJJ-UHFFFAOYSA-N.svg)
Ethyl 7-methyl-4-oxo-2-(propylsulfanyl)-5-(thiophen-2-yl)-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-6-carboxylate
CAS 878123-22-9C18H21N3O3S2
![Methyl 2-(isobutylthio)-7-methyl-4-oxo-5-(2-thienyl)-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-6-carboxylate chemical structure, C18H21N3O3S2, CAS 878122-88-4](/s/NTISQXNYQFAVSE-UHFFFAOYSA-N.svg)
Methyl 2-(isobutylthio)-7-methyl-4-oxo-5-(2-thienyl)-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-6-carboxylate
CAS 878122-88-4C18H21N3O3S2
N-(5-Methyl-4-phenylthiazol-2-yl)-2-((2-morpholino-2-oxoethyl)thio)acetamide
CAS 681225-16-1C18H21N3O3S2
Ethanol, 2,2'-((2-((4,6-di-2-thienyl-2-pyrimidinyl)oxy)ethyl)imino)bis-
CAS 124959-48-4C18H21N3O3S2
![(1R,2S,4R)-N-(6-(N-Isopropylsulfamoyl)benzo[d]thiazol-2-yl)bicyclo[2.2.1]hept-5-ene-2-carboxamide chemical structure, C18H21N3O3S2, CAS 1005265-80-4](/s/FBQAIXURJXJORP-UHFFFAOYSA-N.svg)
(1R,2S,4R)-N-(6-(N-Isopropylsulfamoyl)benzo[d]thiazol-2-yl)bicyclo[2.2.1]hept-5-ene-2-carboxamide
CAS 1005265-80-4C18H21N3O3S2
N-(3-(1-Propionyl-5-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-3-yl)phenyl)ethanesulfonamide
CAS 865615-58-3C18H21N3O3S2
![N-[(Furan-2-yl)methyl]-2-{[3-(3-methylbutyl)-4-oxo-3H,4H-thieno[3,2-d]pyrimidin-2-yl]sulfanyl}acetamide chemical structure, C18H21N3O3S2, CAS 440329-78-2](/s/BGSCWKGARYYJGC-UHFFFAOYSA-N.svg)
N-[(Furan-2-yl)methyl]-2-{[3-(3-methylbutyl)-4-oxo-3H,4H-thieno[3,2-d]pyrimidin-2-yl]sulfanyl}acetamide
CAS 440329-78-2C18H21N3O3S2
- Methyl 5-methyl-2-[(morpholin-4-ylcarbamothioyl)amino]-4-phenylthiophene-3-carboxylate701279-74-5C18H21N3O3S2
- 2-((3-Ethyl-6-methyl-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(3-methoxyphenyl)acetamide851409-74-0C18H21N3O3S2
- N,N-Diethyl-1-(2-methoxyphenyl)-2-sulfanyl-1H-1,3-benzodiazole-5-sulfonamide380431-56-1C18H21N3O3S2
- 2-[(3-Ethyl-6-methyl-4-oxo-6,7-dihydrothieno[3,2-d]pyrimidin-2-yl)sulfanyl]-N-(2-methoxyphenyl)acetamide851409-75-1C18H21N3O3S2
- N-tert-Butyl-2-{2,4-dioxo-3-[2-(thiophen-2-yl)ethyl]-3,4-dihydrothieno[3,2-d]pyrimidin-1(2H)-yl}acetamide1261018-53-4C18H21N3O3S2
- 3-(2-(4-(((4,5-Dihydrothiazol-2-yl)thio)methyl)piperidin-1-yl)-2-oxoethyl)benzo[d]oxazol-2(3H)-one1421500-20-0C18H21N3O3S2
- 2-((3-(2-Methoxyethyl)-6-methyl-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-phenylacetamide851409-99-9C18H21N3O3S2
- N-(4-(4-Methoxyphenyl)thiazol-2-yl)-2-((2-oxo-2-(pyrrolidin-1-yl)ethyl)thio)acetamide681223-59-6C18H21N3O3S2
- 4-Methoxy-3-methyl-N-(2-(5-methyl-3-(thiophen-2-yl)-1H-pyrazol-1-yl)ethyl)benzenesulfonamide2034477-13-7C18H21N3O3S2
- 4-[Butyl(ethyl)sulfamoyl]-N-(3-cyanothiophen-2-yl)benzamide865546-23-2C18H21N3O3S2
- N,N-Diethyl-1-(4-methoxyphenyl)-2-sulfanyl-1H-1,3-benzodiazole-5-sulfonamide571158-98-0C18H21N3O3S2
- 2-((3-Ethyl-6-methyl-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(4-methoxyphenyl)acetamide851409-32-0C18H21N3O3S2
- N-(3-Cyanothiophen-2-yl)-4-(dipropylsulfamoyl)benzamide897615-86-0C18H21N3O3S2
- N-(4-(1-Butyryl-5-(thiophen-2-yl)-4,5-dihydro-1H-pyrazol-3-yl)phenyl)methanesulfonamide941944-51-0C18H21N3O3S2
- Methyl 2-({[4-(4-hydroxyphenyl)piperazin-1-yl]carbonothioyl}amino)-5-methylthiophene-3-carboxylate669728-44-3C18H21N3O3S2
- Methyl 2-({[4-(3-hydroxyphenyl)piperazin-1-yl]carbonothioyl}amino)-5-methylthiophene-3-carboxylate669728-46-5C18H21N3O3S2
- (5Z)-5-(4-{[4-(2-Hydroxyethyl)piperazin-1-yl]carbonyl}benzylidene)-3-methyl-2-thioxo-1,3-thiazolidin-4-one929864-42-6C18H21N3O3S2
- 4-[[(6-Methoxy-4,5,7-trimethyl-1,3-benzothiazol-2-yl)amino]methyl]benzenesulfonamide120165-55-1C18H21N3O3S2
- N-Butyl-2-(2,4-dioxo-3-(2-(thiophen-2-yl)ethyl)-3,4-dihydrothieno[3,2-d]pyrimidin-1(2H)-yl)acetamide1260916-49-1C18H21N3O3S2
- N-(Butan-2-yl)-2-{2,4-dioxo-3-[2-(thiophen-2-yl)ethyl]-3,4-dihydrothieno[3,2-d]pyrimidin-1(2H)-yl}acetamide1260913-77-6C18H21N3O3S2
- (E)-N-((1-(Pyridin-3-ylsulfonyl)piperidin-4-yl)methyl)-3-(thiophen-2-yl)acrylamide1428382-05-1C18H21N3O3S2
- (E)-N-((1-(Pyridin-3-ylsulfonyl)piperidin-4-yl)methyl)-3-(thiophen-3-yl)acrylamide1428382-22-2C18H21N3O3S2
- Ethyl (5-(2-(benzylthio)acetyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)carbamate1351612-00-4C18H21N3O3S2
- Ethyl (5-(2-(ethylthio)benzoyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)carbamate1351599-48-8C18H21N3O3S2
- N-(5-(2-(Cyclopentylthio)acetyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)furan-3-carboxamide1448045-12-2C18H21N3O3S2
- 4-Methoxy-3-methyl-N-(2-(1-methyl-4-(thiophen-2-yl)-1H-imidazol-2-yl)ethyl)benzenesulfonamide1396864-12-2C18H21N3O3S2
- N-(Benzo[d][1,3]dioxol-5-yl)-4-(((4-methylthiazol-2-yl)thio)methyl)piperidine-1-carboxamide1421477-37-3C18H21N3O3S2
- N-[3-(Dimethylamino)propyl]-N-[4-(phenylsulfonyl)-2-(2-thienyl)-1,3-oxazol-5-yl]amine7065-29-4C18H21N3O3S2
- N-(3-Cyano-4,5-dimethylthiophen-2-yl)-4-(diethylsulfamoyl)benzamide896301-08-9C18H21N3O3S2
- N-(5,6-Dihydro-4H-cyclopenta[d]thiazol-2-yl)-1-tosylpyrrolidine-2-carboxamide1049918-59-3C18H21N3O3S2
- 2-(Ethylthio)-N-(2-(3-methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)ethyl)benzamide2034591-23-4C18H21N3O3S2
- 2,3,5,6-Tetramethyl-N-(2-(4-oxothieno[2,3-d]pyrimidin-3(4H)-yl)ethyl)benzenesulfonamide1903171-63-0C18H21N3O3S2
- 2-(Benzylthio)-N-(2-(3-methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)ethyl)acetamide2034454-52-7C18H21N3O3S2
- N-(2-(3-Methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)ethyl)-3-(phenylthio)propanamide2034401-90-4C18H21N3O3S2
- N-(1,3-Dimethyl-2,2-dioxido-1,3-dihydrobenzo[c][1,2,5]thiadiazol-5-yl)-1-(thiophen-2-yl)cyclopentanecarboxamide2034587-13-6C18H21N3O3S2
- (4-(3-Methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)piperidin-1-yl)(4-methylthiophen-2-yl)methanone2034297-12-4C18H21N3O3S2
- 1-(4-(3-Methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)piperidin-1-yl)-2-(thiophen-3-yl)ethanone2034297-44-2C18H21N3O3S2
- 3-(Phenylthio)-N-(1,3,6-trimethyl-2,2-dioxido-1,3-dihydrobenzo[c][1,2,5]thiadiazol-5-yl)propanamide2034590-96-8C18H21N3O3S2
- 1-(4-(3-Methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)piperidin-1-yl)-2-(thiophen-2-yl)ethanone2034296-60-9C18H21N3O3S2
- N-(2-(3,5-Dimethyl-1H-pyrazol-1-yl)-2-(thiophen-3-yl)ethyl)-2-methoxybenzenesulfonamide2034594-65-3C18H21N3O3S2
- N-(2-(1H-Pyrazol-1-yl)-2-(thiophen-3-yl)ethyl)-2-methoxy-4,5-dimethylbenzenesulfonamide2034494-03-4C18H21N3O3S2
- N-(2-(1H-Pyrazol-1-yl)-2-(thiophen-3-yl)ethyl)-2-(4-methoxyphenyl)ethanesulfonamide2034341-59-6C18H21N3O3S2
- N-(2-(3,5-Dimethyl-4-(thiophen-3-yl)-1H-pyrazol-1-yl)ethyl)-4-methoxybenzenesulfonamide2034556-77-7C18H21N3O3S2
- N-(5-Hydroxy-3-(thiophen-3-yl)pentyl)-4-(1H-pyrazol-1-yl)benzenesulfonamide2034467-61-1C18H21N3O3S2
- N-[5-Hydroxy-3-(thiophen-2-yl)pentyl]-4-(1H-pyrazol-1-yl)benzene-1-sulfonamide2097914-47-9C18H21N3O3S2
- 3-(4-Methoxyphenyl)-5-oxo-4-(propan-2-yl)-N-(1,3-thiazol-2-yl)thiomorpholine-2-carboxamide2309773-90-6C18H21N3O3S2
- 2-(Methylsulfanyl)-N-[4-(piperidine-1-sulfonyl)phenyl]pyridine-3-carboxamide775312-88-4C18H21N3O3S2
- 2-[[2-(2,5-Dimethylphenoxy)acetyl]carbamothioylamino]-4,5-dimethylthiophene-3-carboxamide6977-71-5C18H21N3O3S2
- 2-(N-Methyl-2-phenylethenesulfonamido)-N-(4,5,6,7-tetrahydro-1,3-benzothiazol-2-yl)acetamide878119-98-3C18H21N3O3S2
- 4-[2-(Piperidin-1-yl)ethoxy]-1-(thiophene-2-sulfonyl)-1H-indazole825634-66-0C18H21N3O3S2
- N-{2-Hydroxy-2-[4-(thiophen-2-yl)phenyl]ethyl}-1,3,5-trimethyl-1H-pyrazole-4-sulfonamide2380192-50-5C18H21N3O3S2
- 3-Thiophenecarboxamide, 2-[[[(cyclopropylcarbonyl)(2-thienylmethyl)amino]acetyl]amino]-4,5-dimethyl-606110-36-5C18H21N3O3S2
- N-(4-{[(6-Hydroxy-4,5,7-trimethyl-1,3-benzothiazol-2-yl)amino]methyl}phenyl)methanesulfonamide776258-36-7C18H21N3O3S2
Frequently asked questions
What is the molar mass of C18H21N3O3S2?
The molar mass of C18H21N3O3S2 is 391.50 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 3 oxygen atoms and 2 sulfur atoms. The monoisotopic mass is 391.1024 Da.
How many compounds have the formula C18H21N3O3S2?
CompoundList lists 77 compounds with the molecular formula C18H21N3O3S2, including 2-((3,6-Dimethyl-4-oxo-3,4,6,7-tetrahydrothieno[3,2-d]pyrimidin-2-yl)thio)-N-(2-ethoxyphenyl)acetamide, 2-[(3,6-Dimethyl-4-oxo-6,7-dihydrothieno[3,2-d]pyrimidin-2-yl)sulfanyl]-N-(4-ethoxyphenyl)acetamide, 1-(2-(Dimethylamino)ethyl)-4-(2,4-dimethylthiazole-5-carbonyl)-3-hydroxy-5-(thiophen-2-yl)-1H-pyrrol-2(5H)-one. 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 C18H21N3O3S2?
C18H21N3O3S2 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.