Molecular formula
C18H21N5O4S
61 compounds have this formula on CompoundList.
- Molar mass
- 403.46g/mol
- Monoisotopic mass
- 403.1314Da
- Atoms
- 49
- Elements
- 5
- Rings plus double bonds
- 11
The formula C18H21N5O4S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 5 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 × 1853.59%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 215.25%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 517.36%14.007 × 5 = 70.035 g/mol
- O Oxygen × 415.86%15.999 × 4 = 63.996 g/mol
- S Sulfur × 17.95%32.06 × 1 = 32.060 g/mol
Look up another formula
Compounds with the formula C18H21N5O4S
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 61 of 61 compounds
2-((7-(2-Ethoxyethyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)sulfanyl)-N-phenylacetamide
CAS 476481-80-8C18H21N5O4S
![2-(1,3-Dimethyl-2,4-dioxo-7-propylpyrimido[4,5-d]pyrimidin-5-yl)sulfanyl-N-(furan-2-ylmethyl)acetamide chemical structure, C18H21N5O4S, CAS 863002-47-5](/s/VCLVONSJLWCZII-UHFFFAOYSA-N.svg)
2-(1,3-Dimethyl-2,4-dioxo-7-propylpyrimido[4,5-d]pyrimidin-5-yl)sulfanyl-N-(furan-2-ylmethyl)acetamide
CAS 863002-47-5C18H21N5O4S
N-(2-(3-Acetyl-5-nitrothiophen-2-ylazo)-5-diethylaminophenyl)acetamide
CAS 777891-21-1C18H21N5O4S
![2-[[6-[(Dimethylamino)sulfonyl]-1H-benzotriazol-1-yl]oxy]-N-(4-ethylphenyl)acetamide chemical structure, C18H21N5O4S, CAS 556007-06-8](/s/GKPZEUPOJKFEHM-UHFFFAOYSA-N.svg)
2-[[6-[(Dimethylamino)sulfonyl]-1H-benzotriazol-1-yl]oxy]-N-(4-ethylphenyl)acetamide
CAS 556007-06-8C18H21N5O4S
2-Isonicotinoyl-N-(1-tosylpyrrolidin-2-yl)hydrazinecarboxamide
CAS 392248-72-5C18H21N5O4S
![N-(3,5-Dimethoxyphenyl)-2-[3-oxo-6-(propan-2-ylsulfanyl)-2H,3H-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]acetamide chemical structure, C18H21N5O4S, CAS 1040651-98-6](/s/GDCXAWGBYZHYPX-UHFFFAOYSA-N.svg)
N-(3,5-Dimethoxyphenyl)-2-[3-oxo-6-(propan-2-ylsulfanyl)-2H,3H-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]acetamide
CAS 1040651-98-6C18H21N5O4S
![N-{4-[3-(4-Carbamoylpiperidin-1-yl)-3-oxopropyl]-1,3-thiazol-2-yl}-6-oxo-1,6-dihydropyridine-3-carboxamide chemical structure, C18H21N5O4S, CAS 1040644-52-7](/s/VZMNNWDCNWEYOX-UHFFFAOYSA-N.svg)
N-{4-[3-(4-Carbamoylpiperidin-1-yl)-3-oxopropyl]-1,3-thiazol-2-yl}-6-oxo-1,6-dihydropyridine-3-carboxamide
CAS 1040644-52-7C18H21N5O4S
N-(4-(3-(4-Acetylpiperazin-1-yl)-3-oxopropyl)thiazol-2-yl)-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 1091409-32-3C18H21N5O4S
![N-[5-(1,5-Dimethyl-1H-pyrazol-3-yl)-1,3,4-oxadiazol-2-yl]-4-(4-methylbenzenesulfonyl)butanamide chemical structure, C18H21N5O4S, CAS 1019102-26-1](/s/GWGSWORAHROYMV-UHFFFAOYSA-N.svg)
N-[5-(1,5-Dimethyl-1H-pyrazol-3-yl)-1,3,4-oxadiazol-2-yl]-4-(4-methylbenzenesulfonyl)butanamide
CAS 1019102-26-1C18H21N5O4S
N-(4-(3-(4-Carbamoylpiperidin-1-yl)-3-oxopropyl)thiazol-2-yl)-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 1040642-06-5C18H21N5O4S
![5-Hydroxymethyl-3-methyl-2-[6-(3-methylsulfanyl-phenylamino)-purin-9-yl]-tetrahydro-furan-3,4-diol chemical structure, C18H21N5O4S, CAS 565435-03-2](/s/BWYJPTCGKXZQMX-AXYPVASZSA-N.svg)
5-Hydroxymethyl-3-methyl-2-[6-(3-methylsulfanyl-phenylamino)-purin-9-yl]-tetrahydro-furan-3,4-diol
CAS 565435-03-2C18H21N5O4S
Acetamide, N-2-(3-acetyl-5-nitro-2-thienyl)azo-5-(diethylamino)phenyl-
CAS 167940-11-6C18H21N5O4S
![1-{4-Cyano-2-[4-(dimethylsulfamoyl)phenyl]-1,3-oxazol-5-yl}piperidine-4-carboxamide chemical structure, C18H21N5O4S, CAS 941240-55-7](/s/CLTYQFOXEBKHLQ-UHFFFAOYSA-N.svg)
1-{4-Cyano-2-[4-(dimethylsulfamoyl)phenyl]-1,3-oxazol-5-yl}piperidine-4-carboxamide
CAS 941240-55-7C18H21N5O4S
![N-(2,5-Dimethoxyphenyl)-2-(6-(isopropylthio)-3-oxo-[1,2,4]triazolo[4,3-b]pyridazin-2(3H)-yl)acetamide chemical structure, C18H21N5O4S, CAS 1040670-98-1](/s/UOMXVCSNZHPIRD-UHFFFAOYSA-N.svg)
N-(2,5-Dimethoxyphenyl)-2-(6-(isopropylthio)-3-oxo-[1,2,4]triazolo[4,3-b]pyridazin-2(3H)-yl)acetamide
CAS 1040670-98-1C18H21N5O4S
(6-Methoxy-1H-indol-2-yl)(4-((4-methyl-4H-1,2,4-triazol-3-yl)sulfonyl)piperidin-1-yl)methanone
CAS 1448031-29-5C18H21N5O4S
![N-(2-(1H-Imidazo[1,2-b]pyrazol-1-yl)ethyl)-4-(morpholinosulfonyl)benzamide chemical structure, C18H21N5O4S, CAS 1797225-67-2](/s/OQXLLEOFKQHCTK-UHFFFAOYSA-N.svg)
N-(2-(1H-Imidazo[1,2-b]pyrazol-1-yl)ethyl)-4-(morpholinosulfonyl)benzamide
CAS 1797225-67-2C18H21N5O4S
N-(4-Ethoxyphenyl)-2-(1,3,9-trimethyl-2,6-dioxopurin-8-yl)sulfanylacetamide
CAS 897453-32-6C18H21N5O4S
![N-(3,4-Dimethoxyphenyl)-2-[3-oxo-6-(propan-2-ylsulfanyl)-2H,3H-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]acetamide chemical structure, C18H21N5O4S, CAS 1040652-40-1](/s/GXAZTFIONMAGMF-UHFFFAOYSA-N.svg)
N-(3,4-Dimethoxyphenyl)-2-[3-oxo-6-(propan-2-ylsulfanyl)-2H,3H-[1,2,4]triazolo[4,3-b]pyridazin-2-yl]acetamide
CAS 1040652-40-1C18H21N5O4S
![tert-Butyl 2-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)hydrazinecarboxylate chemical structure, C18H21N5O4S, CAS 1201186-55-1](/s/NGRCJHBGOJOUNW-UHFFFAOYSA-N.svg)
tert-Butyl 2-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)hydrazinecarboxylate
CAS 1201186-55-1C18H21N5O4S
![2-(7,8-Dimethoxy-1-oxophthalazin-2(1H)-yl)-N-[5-(2-methylpropyl)-1,3,4-thiadiazol-2-yl]acetamide chemical structure, C18H21N5O4S, CAS 1380585-18-1](/s/UERUDWXVNHWLEZ-UHFFFAOYSA-N.svg)
2-(7,8-Dimethoxy-1-oxophthalazin-2(1H)-yl)-N-[5-(2-methylpropyl)-1,3,4-thiadiazol-2-yl]acetamide
CAS 1380585-18-1C18H21N5O4S
1-((1-(1-((2,3-Dihydrobenzofuran-5-yl)sulfonyl)azetidin-3-yl)-1H-1,2,3-triazol-4-yl)methyl)pyrrolidin-2-one
CAS 2034269-94-6C18H21N5O4S
![N-(2,4-Dimethoxyphenyl)-2-((7-oxo-5-propyl-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide chemical structure, C18H21N5O4S, CAS 895004-13-4](/s/DTAYGMNTMVZTBF-UHFFFAOYSA-N.svg)
N-(2,4-Dimethoxyphenyl)-2-((7-oxo-5-propyl-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide
CAS 895004-13-4C18H21N5O4S
![N-(2,5-Dimethoxyphenyl)-2-((7-oxo-5-propyl-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide chemical structure, C18H21N5O4S, CAS 895004-21-4](/s/HMMRRBRTXCLOKM-UHFFFAOYSA-N.svg)
N-(2,5-Dimethoxyphenyl)-2-((7-oxo-5-propyl-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide
CAS 895004-21-4C18H21N5O4S
![N-(3,4-Dimethoxyphenyl)-2-((7-oxo-5-propyl-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide chemical structure, C18H21N5O4S, CAS 895004-29-2](/s/DDFZAHXHRPQZAR-UHFFFAOYSA-N.svg)
N-(3,4-Dimethoxyphenyl)-2-((7-oxo-5-propyl-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide
CAS 895004-29-2C18H21N5O4S
- N-(3,4-Dimethoxyphenethyl)-2-((5-methyl-7-oxo-7,8-dihydro-[1,2,4]triazolo[4,3-a]pyrimidin-3-yl)thio)acetamide877639-28-6C18H21N5O4S
- Guanidine, N-(1,1-dimethylethyl)-N'-(5-hydroxy-1-naphthalenyl)-N''-2-thiazolyl-, mononitrate(salt)72041-75-9C18H21N5O4S
- N-(2-Methoxy-5-methylphenyl)-2-(1,3,9-trimethyl-2,6-dioxopurin-8-yl)sulfanylacetamide897454-19-2C18H21N5O4S
- 4-(2-((1,3,6-Trimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidin-5-yl)amino)ethyl)benzenesulfonamide946275-11-2C18H21N5O4S
- 3-[3-(1H-Indol-6-yl)-1,2,4-oxadiazol-5-yl]-1-[4-(methylsulfonyl)piperazin-1-yl]propan-1-one1401576-83-7C18H21N5O4S
- N1-(pyridin-3-yl)-N2-((1-(pyridin-3-ylsulfonyl)piperidin-4-yl)methyl)oxalamide1428351-48-7C18H21N5O4S
- N-(2-(3-Cyclopropyl-5-oxo-4-phenyl-4,5-dihydro-1H-1,2,4-triazol-1-yl)ethyl)-3,5-dimethylisoxazole-4-sulfonamide1396882-93-1C18H21N5O4S
- 1-(1-((1-Methyl-1H-imidazol-4-yl)sulfonyl)piperidin-4-yl)-3-phenylimidazolidine-2,4-dione2034605-14-4C18H21N5O4S
- 2-(4-(Isopropylsulfonyl)phenyl)-N-((3-(1-methyl-1H-pyrazol-4-yl)-1,2,4-oxadiazol-5-yl)methyl)acetamide2034384-54-6C18H21N5O4S
- N-(4-Amino-6-oxo-2-((2-oxo-2-(pyrrolidin-1-yl)ethyl)thio)-1,6-dihydropyrimidin-5-yl)-4-methoxybenzamide888416-70-4C18H21N5O4S
- 5-((2,6-Dimethylmorpholino)(4-nitrophenyl)methyl)-2-methylthiazolo[3,2-b][1,2,4]triazol-6-ol1008069-88-2C18H21N5O4S
- N-(2-Ethoxyphenyl)-2-(1,3,9-trimethyl-2,6-dioxopurin-8-yl)sulfanylacetamide897453-34-8C18H21N5O4S
- N-((1-(3,4-Dimethylphenyl)-1H-tetrazol-5-yl)methyl)-3,4-dimethoxybenzenesulfonamide941964-25-6C18H21N5O4S
- N-((1-(3,4-Dimethylphenyl)-1H-tetrazol-5-yl)methyl)-2,5-dimethoxybenzenesulfonamide941922-38-9C18H21N5O4S
- N-((1-(4-Ethoxyphenyl)-1H-tetrazol-5-yl)methyl)-4-methoxy-3-methylbenzenesulfonamide951482-69-2C18H21N5O4S
- 2-Ethyl-5-((4-hydroxypiperidin-1-yl)(4-nitrophenyl)methyl)thiazolo[3,2-b][1,2,4]triazol-6-ol898350-52-2C18H21N5O4S
- 4-(2-((1-(2-(Cyclopropylamino)-2-oxoethyl)-5-(hydroxymethyl)-1H-imidazol-2-yl)thio)acetamido)benzamide921568-02-7C18H21N5O4S
- 2-[(14,14-Dimethyl-13-oxa-10-thia-3,5,6,8-tetrazatetracyclo[7.7.0.02,6.011,16]hexadeca-1(9),2,4,7,11(16)-pentaen-4-yl)oxy]-1-morpholin-4-ylethanone1010908-49-2C18H21N5O4S
- 1-(4-(1-Methyl-1H-pyrazol-4-yl)-1,2,3,4-tetrahydroisoquinoline-2-carbonyl)-3-(methylsulfonyl)imidazolidin-2-one2034534-72-8C18H21N5O4S
- 2-Methyl-6-(4-(3-methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)piperidine-1-carbonyl)pyridazin-3(2H)-one2034296-27-8C18H21N5O4S
- 2-(2-(4-(3-Methyl-2,2-dioxidobenzo[c][1,2,5]thiadiazol-1(3H)-yl)piperidin-1-yl)-2-oxoethyl)pyridazin-3(2H)-one2034297-27-1C18H21N5O4S
- N-[2-(Dimethylamino)-5,6,7,8-tetrahydroquinazolin-6-yl]-3-methyl-2-oxo-2,3-dihydro-1,3-benzoxazole-5-sulfonamide2097862-26-3C18H21N5O4S
- 2-[2-Amino-6-(2-phenylethylsulfanyl)purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol13153-21-4C18H21N5O4S
- 2-[2-Amino-6-[(4-methylphenyl)methylsulfanyl]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol93996-50-0C18H21N5O4S
- 2-[6-Benzylsulfanyl-2-(methylamino)purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol4478-00-6C18H21N5O4S
- 2-[(3-Ethyl[1,2,4]triazolo[4,3-b]pyridazin-6-yl)sulfanyl]-N-(3,4,5-trimethoxyphenyl)acetamide1232788-18-9C18H21N5O4S
- tert-Butyl 1-(5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)hydrazinecarboxylate1201186-56-2C18H21N5O4S
- N-{1-[4-(Morpholine-4-sulfonyl)benzoyl]azetidin-3-yl}pyridazin-3-amine2097926-61-7C18H21N5O4S
- N-{1-[4-(Morpholine-4-sulfonyl)benzoyl]azetidin-3-yl}pyrimidin-4-amine2097926-80-0C18H21N5O4S
- N-(4-Amino-6-oxo-2-((2-oxo-2-(((tetrahydrofuran-2-yl)methyl)amino)ethyl)thio)-1,6-dihydropyrimidin-5-yl)benzamide888414-14-0C18H21N5O4S
- 4-Cyano-N-[1-(1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)piperidin-4-yl]benzene-1-sulfonamide2640835-33-0C18H21N5O4S
- 3-Methoxy-N-[5-(2-morpholin-4-ylpyrimidin-5-yl)oxy-1,3-thiazol-2-yl]bicyclo[1.1.1]pentane-1-carboxamide3055038-20-2C18H21N5O4S
- Orb19080192095417-16-4C18H21N5O4S
- Methyl N-[4-[[3-(6-methylpyrimidin-4-yl)-3,6-diazabicyclo[3.1.1]hexan-6-yl]sulfonyl]phenyl]carbamate3066656-69-4C18H21N5O4S
- 4-(Morpholine-4-sulfonyl)-N-[1-(pyrazin-2-yl)azetidin-3-yl]benzamide2415570-45-3C18H21N5O4S
- 5-[4-[(1,1-Dioxo-1,2-benzothiazol-3-ylidene)amino]piperidin-1-yl]-1,3-dimethylpyrimidine-2,4-dione2770592-85-1C18H21N5O4S
- 2'-Deoxy-6-S-[(4-methoxyphenyl)methyl]-6-thioGuanosine552290-58-1C18H21N5O4S
Frequently asked questions
What is the molar mass of C18H21N5O4S?
The molar mass of C18H21N5O4S is 403.46 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 5 nitrogen atoms, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 403.1314 Da.
How many compounds have the formula C18H21N5O4S?
CompoundList lists 61 compounds with the molecular formula C18H21N5O4S, including 2-((7-(2-Ethoxyethyl)-3-methyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)sulfanyl)-N-phenylacetamide, 2-(1,3-Dimethyl-2,4-dioxo-7-propylpyrimido[4,5-d]pyrimidin-5-yl)sulfanyl-N-(furan-2-ylmethyl)acetamide, N-(2-(3-Acetyl-5-nitrothiophen-2-ylazo)-5-diethylaminophenyl)acetamide. 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 C18H21N5O4S?
C18H21N5O4S has a degree of unsaturation of 11. 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.