Molecular formula
C18H21N3O4S
242 compounds have this formula on CompoundList.
- Molar mass
- 375.44g/mol
- Monoisotopic mass
- 378.1441Da
- Atoms
- 47
- Elements
- 5
- Rings plus double bonds
- 10
The formula C18H21N3O4S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 4 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 × 1857.58%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 215.64%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 311.19%14.007 × 3 = 42.021 g/mol
- O Oxygen × 417.05%15.999 × 4 = 63.996 g/mol
- S Sulfur × 18.54%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H21N3O4S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 242 compounds
Rabeprazole sulfone
CAS 117976-47-3C18H21N3O4S
![2-[[6-(3,4-Dimethoxyphenyl)-3-pyridazinyl]thio]-1-(4-morpholinyl)ethanone chemical structure, C18H21N3O4S, CAS 626222-54-6](/s/JTSDYQPIIAAEFO-UHFFFAOYSA-N.svg)
2-[[6-(3,4-Dimethoxyphenyl)-3-pyridazinyl]thio]-1-(4-morpholinyl)ethanone
CAS 626222-54-6C18H21N3O4S
Rabeprazole N-oxide
CAS 924663-38-7C18H21N3O4S
![N-(2-(4-Methoxyphenyl)-5,5-dioxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)cyclopentanecarboxamide chemical structure, C18H21N3O4S, CAS 450337-61-8](/s/XTYYZCJMBPZMNY-UHFFFAOYSA-N.svg)
N-(2-(4-Methoxyphenyl)-5,5-dioxido-4,6-dihydro-2H-thieno[3,4-c]pyrazol-3-yl)cyclopentanecarboxamide
CAS 450337-61-8C18H21N3O4S
1-(2-(Dimethylamino)ethyl)-4-(2,4-dimethylthiazole-5-carbonyl)-5-(furan-2-yl)-3-hydroxy-1H-pyrrol-2(5H)-one
CAS 627817-10-1C18H21N3O4S
4-(4-Nitrophenyl)-N-(2-pyrrolidin-1-ylethyl)benzenesulfonamide
CAS 313496-41-2C18H21N3O4S
![3,4-Dimethoxy-N-(2-(8-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide chemical structure, C18H21N3O4S, CAS 868979-19-5](/s/OWDTVJAEGWUMII-UHFFFAOYSA-N.svg)
3,4-Dimethoxy-N-(2-(8-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide
CAS 868979-19-5C18H21N3O4S
![N-Cyclohexyl-2-[[5-(2,3-dihydro-1,4-benzodioxin-3-yl)-1,3,4-oxadiazol-2-yl]sulfanyl]acetamide chemical structure, C18H21N3O4S, CAS 851130-01-3](/s/RZFZXTZURCZARZ-UHFFFAOYSA-N.svg)
N-Cyclohexyl-2-[[5-(2,3-dihydro-1,4-benzodioxin-3-yl)-1,3,4-oxadiazol-2-yl]sulfanyl]acetamide
CAS 851130-01-3C18H21N3O4S
![N-(2-Acetamidophenyl)-2-[methyl-(4-methylphenyl)sulfonylamino]acetamide chemical structure, C18H21N3O4S, CAS 701246-82-4](/s/GJFXYMUMFTXUIL-UHFFFAOYSA-N.svg)
N-(2-Acetamidophenyl)-2-[methyl-(4-methylphenyl)sulfonylamino]acetamide
CAS 701246-82-4C18H21N3O4S
![2-{[3-(3,4-Dimethoxyphenyl)acryloyl]amino}-N,N,4-trimethyl-1,3-thiazole-5-carboxamide chemical structure, C18H21N3O4S, CAS 1164543-89-8](/s/KMXSIRADIPEIHY-VQHVLOKHSA-N.svg)
2-{[3-(3,4-Dimethoxyphenyl)acryloyl]amino}-N,N,4-trimethyl-1,3-thiazole-5-carboxamide
CAS 1164543-89-8C18H21N3O4S
![1-Benzylsulfonyl-4-[(3-nitrophenyl)methyl]piperazine chemical structure, C18H21N3O4S, CAS 792929-40-9](/s/DISMBVVNBLHGRV-UHFFFAOYSA-N.svg)
1-Benzylsulfonyl-4-[(3-nitrophenyl)methyl]piperazine
CAS 792929-40-9C18H21N3O4S
![Ethyl (2-{[4-(butyrylamino)benzoyl]amino}-1,3-thiazol-4-yl)acetate chemical structure, C18H21N3O4S, CAS 824419-25-2](/s/ZOYJJYGADJHUAF-UHFFFAOYSA-N.svg)
Ethyl (2-{[4-(butyrylamino)benzoyl]amino}-1,3-thiazol-4-yl)acetate
CAS 824419-25-2C18H21N3O4S
![2-[[5-(Furan-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl]-1-[1-(1-methoxypropan-2-yl)-2,5-dimethylpyrrol-3-yl]ethanone chemical structure, C18H21N3O4S, CAS 763096-14-6](/s/XJEFQWVJNZFXHZ-UHFFFAOYSA-N.svg)
2-[[5-(Furan-2-yl)-1,3,4-oxadiazol-2-yl]sulfanyl]-1-[1-(1-methoxypropan-2-yl)-2,5-dimethylpyrrol-3-yl]ethanone
CAS 763096-14-6C18H21N3O4S
N-(2,4-Dimethoxyphenyl)-4-(furan-2-carbonyl)piperazine-1-carbothioamide
CAS 433312-94-8C18H21N3O4S
![1-(2,2-Dimethoxy-ethylsulfanyl)-8,8-dimethyl-8,9-dihydro-6H-7,11-dioxa-2,4,10-triaza-benzo[b]fluorene chemical structure, C18H21N3O4S, CAS 896071-96-8](/s/UFDKVXFROJACKH-UHFFFAOYSA-N.svg)
1-(2,2-Dimethoxy-ethylsulfanyl)-8,8-dimethyl-8,9-dihydro-6H-7,11-dioxa-2,4,10-triaza-benzo[b]fluorene
CAS 896071-96-8C18H21N3O4S
5-Ethyl-6-hydroxy-2-((2-morpholino-2-oxoethyl)thio)-3-phenylpyrimidin-4(3H)-one
CAS 372976-57-3C18H21N3O4S
![1-Benzylsulfonyl-4-[(2-nitrophenyl)methyl]piperazine chemical structure, C18H21N3O4S, CAS 792926-69-3](/s/MFJOPPQRBAHORD-UHFFFAOYSA-N.svg)
1-Benzylsulfonyl-4-[(2-nitrophenyl)methyl]piperazine
CAS 792926-69-3C18H21N3O4S
![3-(2-Methylpropanoylamino)-N-[(4-sulfamoylphenyl)methyl]benzamide chemical structure, C18H21N3O4S, CAS 599190-43-9](/s/JVEUTRQQZQALLY-UHFFFAOYSA-N.svg)
3-(2-Methylpropanoylamino)-N-[(4-sulfamoylphenyl)methyl]benzamide
CAS 599190-43-9C18H21N3O4S
4-Methyl-3-morpholin-4-ylsulfonyl-N-(pyridin-4-ylmethyl)benzamide
CAS 915905-46-3C18H21N3O4S
![1-[2-(3,4-Dimethoxyphenyl)ethyl]-5-oxo-N-(1,3-thiazol-2-yl)pyrrolidine-3-carboxamide chemical structure, C18H21N3O4S, CAS 851472-19-0](/s/ZCKRLVVUCKZLNM-UHFFFAOYSA-N.svg)
1-[2-(3,4-Dimethoxyphenyl)ethyl]-5-oxo-N-(1,3-thiazol-2-yl)pyrrolidine-3-carboxamide
CAS 851472-19-0C18H21N3O4S
![1-[(4-Methylphenyl)sulfonyl]-4-(2-nitrobenzyl)piperazine chemical structure, C18H21N3O4S, CAS 423743-06-0](/s/HTAUHXNAXSUSCQ-UHFFFAOYSA-N.svg)
1-[(4-Methylphenyl)sulfonyl]-4-(2-nitrobenzyl)piperazine
CAS 423743-06-0C18H21N3O4S
![Ethyl 4-[2-(2,3-dimethylanilino)-2-oxoethyl]sulfanyl-6-methyl-2-oxo-1H-pyrimidine-5-carboxylate chemical structure, C18H21N3O4S, CAS 946209-49-0](/s/QWQXAZCJWPDYEZ-UHFFFAOYSA-N.svg)
Ethyl 4-[2-(2,3-dimethylanilino)-2-oxoethyl]sulfanyl-6-methyl-2-oxo-1H-pyrimidine-5-carboxylate
CAS 946209-49-0C18H21N3O4S
![2-Methyl-1-[(4-methylphenyl)sulfonyl]-4-(4-nitrophenyl)piperazine chemical structure, C18H21N3O4S, CAS 433327-98-1](/s/UHANQFJOMAMEMG-UHFFFAOYSA-N.svg)
2-Methyl-1-[(4-methylphenyl)sulfonyl]-4-(4-nitrophenyl)piperazine
CAS 433327-98-1C18H21N3O4S
1-Benzylsulfonyl-2-methyl-4-(4-nitrophenyl)piperazine
CAS 524034-02-4C18H21N3O4S
- N'-[(2H-1,3-Benzodioxol-5-yl)methyl]-N-[2-(dimethylamino)-2-(thiophen-2-yl)ethyl]ethanediamide941976-00-7C18H21N3O4S
- 6-Hydroxy-3-(2-methoxyphenyl)-2-{[2-oxo-2-(piperidin-1-yl)ethyl]sulfanyl}pyrimidin-4(3H)-one415703-61-6C18H21N3O4S
- 1-(Benzo[d][1,3]dioxol-5-yl)-3-(2-morpholino-2-(thiophen-3-yl)ethyl)urea1170225-42-9C18H21N3O4S
- 1-(4-Methylphenyl)sulfonyl-4-[(3-nitrophenyl)methyl]piperazine425392-32-1C18H21N3O4S
- 6-(3,4-Dihydroisoquinolin-2(1H)-ylcarbonyl)-2-(1,1-dioxidotetrahydrothiophen-3-yl)-4,5-dihydropyridazin-3(2H)-one850025-30-8C18H21N3O4S
- Phenyl 4-((pyridine-3-sulfonamido)methyl)piperidine-1-carboxylate1235360-94-7C18H21N3O4S
- 1-(4-((4-(5-Cyclopropyl-1,3,4-oxadiazol-2-yl)piperidin-1-yl)sulfonyl)phenyl)ethanone1211216-26-0C18H21N3O4S
- Isopropyl 2-(1,1-dioxido-4-(p-tolyl)-3,4-dihydro-2H-pyrido[2,3-e][1,2,4]thiadiazin-2-yl)acetate1251596-98-1C18H21N3O4S
- N-Cyclohexyl-2-{[5-(2,3-dihydro-1,4-benzodioxin-6-yl)-1,3,4-oxadiazol-2-yl]sulfanyl}acetamide851129-85-6C18H21N3O4S
- N1-(benzo[d][1,3]dioxol-5-ylmethyl)-N2-(2-(dimethylamino)-2-(thiophen-3-yl)ethyl)oxalamide946375-05-9C18H21N3O4S
- 2,5-Dimethoxy-N-(2-(7-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide868978-97-6C18H21N3O4S
- 1-(4-Methylbenzyl)-4-[(4-nitrophenyl)sulfonyl]piperazine519005-19-7C18H21N3O4S
- [2-Methoxy-5-(piperidylsulfonyl)phenyl]-N-(2-pyridyl)carboxamide919052-81-6C18H21N3O4S
- 1-(4-Methylbenzyl)-4-[(2-nitrophenyl)sulfonyl]piperazine428826-45-3C18H21N3O4S
- 7-(2,4-Dimethoxyphenyl)-2-morpholino-6,7-dihydrothiazolo[4,5-b]pyridin-5(4H)-one1190296-65-1C18H21N3O4S
- 5H-Pyrido[3,4-b][1,4]benzothiazine-5-propanamine, N,N-dimethyl-, ethanedioate115072-03-2C18H21N3O4S
- (S)-2-Nitro-N-(1-phenyl-2-pyrrolidin-1-YL-ethyl)-benzenesulfonamide675602-60-5C18H21N3O4S
- (4S)-5,5-Dimethyl-2-[[[(5-methyl-3-phenyl-4-isoxazolyl)carbonyl]amino]methyl]-4-thiazolidinecarboxylic acid1642559-63-4C18H21N3O4S
- N-(2,4-Dimethoxyphenyl)-2-[(4-hydroxy-5,6,7,8-tetrahydroquinazolin-2-yl)sulfanyl]acetamide902444-24-0C18H21N3O4S
- 4-{[(3,5-Dimethoxyphenyl)amino]thioxomethyl}piperazinyl 2-furyl ketone433323-87-6C18H21N3O4S
- Ethyl 1-[2-(4-oxo-2-sulfanylidene-1H-quinazolin-3-yl)acetyl]piperidine-3-carboxylate451466-02-7C18H21N3O4S
- 2-[[5-(2,3-Dihydro-1,4-benzodioxin-6-yl)-1,3,4-oxadiazol-2-yl]sulfanyl]-1-(2-methylpiperidin-1-yl)ethanone851129-95-8C18H21N3O4S
- 4-{[(2,5-Dimethoxyphenyl)amino]thioxomethyl}piperazinyl 2-furyl ketone433321-18-7C18H21N3O4S
- 4-[[2-(3,5-Dimethyl-N-methylsulfonylanilino)acetyl]amino]benzamide428495-02-7C18H21N3O4S
- (E)-2-(4-Acetylpiperazin-1-yl)-5-(3,4-dimethoxybenzylidene)thiazol-4(5H)-one848279-25-4C18H21N3O4S
- 4-Methyl-3-nitro-N-(4-piperidin-1-ylphenyl)benzenesulfonamide5861-34-7C18H21N3O4S
- 1-Benzyl-4-(2-methyl-5-nitrobenzenesulfonyl)piperazine325809-63-0C18H21N3O4S
- N-(4-Acetamidophenyl)-2-(N-methylsulfonylanilino)propanamide1008064-11-6C18H21N3O4S
- 4-[3-[4-(Ethylsulfamoyl)phenyl]propanoylamino]benzamide833435-63-5C18H21N3O4S
- N-(4-Acetamidophenyl)-3-(4-methylbenzenesulfonamido)propanamide847938-09-4C18H21N3O4S
- N-(3-(5-(Furan-2-yl)-1-isobutyryl-4,5-dihydro-1H-pyrazol-3-yl)phenyl)methanesulfonamide851718-86-0C18H21N3O4S
- N1-(2,3-dimethylphenyl)-N2-(4-sulfamoylphenethyl)oxalamide887204-58-2C18H21N3O4S
- N-{4-[1-Butanoyl-5-(furan-2-yl)-4,5-dihydro-1H-pyrazol-3-yl]phenyl}methanesulfonamide923122-24-1C18H21N3O4S
- 1-(5-(1,1-Dioxidoisothiazolidin-2-yl)-2-methylphenyl)-3-(4-methoxyphenyl)urea1203419-22-0C18H21N3O4S
- 1-[(3-Methylphenyl)methyl]-4-(4-nitrophenyl)sulfonylpiperazine428849-04-1C18H21N3O4S
- 2-((5-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-1,3,4-oxadiazol-2-yl)thio)-1-(4-methylpiperidin-1-yl)ethanone851129-74-3C18H21N3O4S
- N-(1-Benzylpiperidin-4-yl)-2-nitrobenzenesulfonamide205058-89-5C18H21N3O4S
- 2-[[5-(1,3-Benzodioxol-5-yl)-1,3,4-oxadiazol-2-yl]sulfanyl]-N-(cyclohexylmethyl)acetamide854025-80-2C18H21N3O4S
- 1-(Benzylsulfonyl)-4-(4-nitrobenzyl)piperazine519005-37-9C18H21N3O4S
- (Z)-2-(2,5-Dioxopyrrolidin-1-yl)-N-(3-(2-ethoxyethyl)-6-methylbenzo[d]thiazol-2(3H)-ylidene)acetamide865162-18-1C18H21N3O4S
- N-Cyclopropyl-6-(8-oxo-6-sulfanylidene-5H-[1,3]dioxolo[4,5-g]quinazolin-7-yl)hexanamide688053-93-2C18H21N3O4S
- N-Cyclopentyl-4-(8-oxo-6-sulfanylidene-5H-[1,3]dioxolo[4,5-g]quinazolin-7-yl)butanamide688054-64-0C18H21N3O4S
- 6-(8-Oxo-6-sulfanylidene-5H-[1,3]dioxolo[4,5-g]quinazolin-7-yl)-N-prop-2-enylhexanamide688053-41-0C18H21N3O4S
- N-Cyclohexyl-3-(8-oxo-6-thioxo-5,6-dihydro-[1,3]dioxolo[4,5-g]quinazolin-7(8H)-yl)propanamide688055-28-9C18H21N3O4S
- N-(4-Methylphenyl)-2-(2-oxo-5-pyrrolidin-1-ylsulfonylpyridin-1-yl)acetamide949268-78-4C18H21N3O4S
- [(1-Cyano-1,2-dimethylpropyl)carbamoyl]methyl 2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-4-yl)acetate874011-01-5C18H21N3O4S
- 2-(2-Oxo-5-(pyrrolidin-1-ylsulfonyl)pyridin-1(2H)-yl)-N-(o-tolyl)acetamide949303-03-1C18H21N3O4S
- N-(3-Methylphenyl)-2-[2-oxo-5-(pyrrolidin-1-ylsulfonyl)pyridin-1(2H)-yl]acetamide949271-97-0C18H21N3O4S
- 2-[4-(4-Acetamido-2-methylbenzenesulfonamido)phenyl]-N-methylacetamide1060247-18-8C18H21N3O4S
- Phenyl ((1-(pyridin-3-ylsulfonyl)piperidin-4-yl)methyl)carbamate1428373-99-2C18H21N3O4S
- 3-(Phenylsulfonyl)-1-(4-(pyrazin-2-yloxy)piperidin-1-yl)propan-1-one1448134-31-3C18H21N3O4S
- 2-Phenoxycarbonylamino-6,7-dihydro-4H-thiazolo(5,4-c)pyridine-5-carboxylic acid tert-butyl ester1440954-95-9C18H21N3O4S
- 3-((1-((2,3-Dihydrobenzofuran-5-yl)sulfonyl)piperidin-3-yl)oxy)-6-methylpyridazine2034473-02-2C18H21N3O4S
- N-(4-Acetamidophenyl)-2-(2-methyl-N-methylsulfonylanilino)acetamide663165-71-7C18H21N3O4S
- 1-[(2-Methylphenyl)methyl]-4-(4-nitrophenyl)sulfonylpiperazine428850-98-0C18H21N3O4S
- 1-(2,6-Dimethylphenyl)-4-(4-nitrophenyl)sulfonylpiperazine694461-60-4C18H21N3O4S
- 2-[[2-(4-Ethyl-N-methylsulfonylanilino)acetyl]amino]benzamide461450-55-5C18H21N3O4S
- N-(4-(5-(Furan-2-yl)-1-propionyl-4,5-dihydro-1H-pyrazol-3-yl)phenyl)ethanesulfonamide714263-19-1C18H21N3O4S
- 2,5-Dimethoxy-N-(2-(8-methylimidazo[1,2-a]pyridin-2-yl)ethyl)benzenesulfonamide868979-21-9C18H21N3O4S
- N1-(3,4-dimethylphenyl)-N2-(4-sulfamoylphenethyl)oxalamide887204-74-2C18H21N3O4S
- N1-(2,4-dimethylphenyl)-N2-(4-sulfamoylphenethyl)oxalamide887204-77-5C18H21N3O4S
- N1-(2,5-dimethylphenyl)-N2-(4-sulfamoylphenethyl)oxalamide887204-80-0C18H21N3O4S
- N-Methyl-2-(2-oxo-5-pyrrolidin-1-ylsulfonylpyridin-1-yl)-N-phenylacetamide1251608-94-2C18H21N3O4S
- Methyl 5,5-dimethyl-2-(pyridin-3-ylmethylcarbamoylamino)-4,7-dihydrothieno[2,3-c]pyran-3-carboxylate903863-87-6C18H21N3O4S
- 5-(1,3-Benzodioxol-5-ylmethylene)-3-[(2,6-dimethylmorpholino)methyl]-2-thioxotetrahydro-4H-imidazol-4-one865659-56-9C18H21N3O4S
- 2-(1,1-Dioxidotetrahydrothiophen-3-yl)-N-(4-methoxyphenyl)-2,4,5,6-tetrahydrocyclopenta[c]pyrazole-3-carboxamide953851-80-4C18H21N3O4S
- Methyl 2-({[4-(4-methoxyphenyl)piperazin-1-yl]carbonyl}amino)thiophene-3-carboxylate777874-68-7C18H21N3O4S
- 1-(1-(3,4-Dimethoxyphenyl)-5-oxopyrrolidin-3-yl)-3-(thiophen-2-ylmethyl)urea877641-52-6C18H21N3O4S
- 4-[2-[[[(3,4-Dihydro-2H-1-benzopyran-3-yl)amino]carbonyl]amino]ethyl]benzenesulfonamide951544-49-3C18H21N3O4S
- Ethyl 1-{[2-(acetylamino)-1,3-benzothiazol-6-yl]carbonyl}-3-piperidinecarboxylate1010928-23-0C18H21N3O4S
- 2-[2-Oxo-5-(piperidin-1-ylsulfonyl)pyridin-1(2H)-yl]-N-phenylacetamide1251630-98-4C18H21N3O4S
- 3-(Pyridine-3-sulfonamido)cyclohexyl phenylcarbamate1396855-68-7C18H21N3O4S
- N-(3-Hydroxy-3-(1-methyl-1H-pyrrol-2-yl)propyl)-4-(2-methyloxazol-4-yl)benzenesulfonamide1795305-34-8C18H21N3O4S
- N-[(1r,4r)-4-(Pyrazin-2-yloxy)cyclohexyl]-2,3-dihydro-1-benzofuran-5-sulfonamide2034317-10-5C18H21N3O4S
- 5-Amino-4-[4-(3,4-dimethoxyphenyl)-1,3-thiazol-2-yl]-1-(3-hydroxypropyl)-1,2-dihydro-3H-pyrrol-3-one929866-39-7C18H21N3O4S
- 5-Amino-4-(4,5-dimethyl-1,3-thiazol-2-yl)-1-(3,4,5-trimethoxyphenyl)-1,2-dihydro-3H-pyrrol-3-one951973-40-3C18H21N3O4S
Frequently asked questions
What is the molar mass of C18H21N3O4S?
The molar mass of C18H21N3O4S is 375.44 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 378.1441 Da.
How many compounds have the formula C18H21N3O4S?
CompoundList lists 242 compounds with the molecular formula C18H21N3O4S, including Rabeprazole sulfone, 2-[[6-(3,4-Dimethoxyphenyl)-3-pyridazinyl]thio]-1-(4-morpholinyl)ethanone, Rabeprazole N-oxide. 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 C18H21N3O4S?
C18H21N3O4S 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.