Molecular formula

C₁₈H₂₁N₅S

40 compounds have this formula on CompoundList.

Molar mass: 339.46g/mol
Monoisotopic mass: 339.1518Da
Atoms: 45
Elements: 4
Rings plus double bonds: 11

The formula C18H21N5S describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 5 nitrogen 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 × 1863.69%
12.011 × 18 = 216.198 g/mol
H Hydrogen × 216.24%
1.008 × 21 = 21.168 g/mol
N Nitrogen × 520.63%
14.007 × 5 = 70.035 g/mol
S Sulfur × 19.44%
32.06 × 1 = 32.060 g/mol

Look up another formula

Compounds with the formula C18H21N5S

Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.

Showing 1 to 40 of 40 compounds

N4-isobutyl-N2-((2-phenylthiazol-4-yl)methyl)pyrimidine-2,4-diamine

CAS 1262770-73-9C₁₈H₂₁N₅S

Tofimilast

CAS 185954-27-2C₁₈H₂₁N₅S

6-(Benzylsulfanyl)-9-cyclohexyl-9H-purin-2-amine

CAS 93996-67-9C₁₈H₂₁N₅S

4,6-Diamino-1,2-dihydro-2,2-dimethyl-1-(4-phenylthiomethylphenyl)-1,3,5-triazine

CAS 87739-93-3C₁₈H₂₁N₅S

4-Methyl-5-{[2-(4-phenyl-4H-1,2,4-triazol-3-yl)piperidino]methyl}-1,3-thiazole

CAS 1340938-23-9C₁₈H₂₁N₅S

N-tert-Butyl-N'-(2-methylquinolin-6-yl)-N''-1,3-thiazol-2-ylguanidine

CAS 72041-93-1C₁₈H₂₁N₅S

Guanidine, 1-isobutyl-2-(2-methyl-4-quinolyl)-3-(2-thiazolyl)-

CAS 71079-46-4C₁₈H₂₁N₅S

Guanidine, N-(1,1-dimethylethyl)-N'-(2-methyl-3-quinolinyl)-N''-2-thiazolyl-

CAS 72041-91-9C₁₈H₂₁N₅S

Guanidine, N-(1,1-dimethylethyl)-N'-(2-methyl-8-quinolinyl)-N''-2-thiazolyl-

CAS 72041-95-3C₁₈H₂₁N₅S

Guanidine, 1-tert-butyl-2-(2-methyl-4-quinolyl)-3-(2-thiazolyl)-

CAS 71079-32-8C₁₈H₂₁N₅S

Guanidine, 1-butyl-2-(2-methyl-4-quinolyl)-3-(2-thiazolyl)-

CAS 71079-45-3C₁₈H₂₁N₅S

Guanidine, 1-sec-butyl-2-(2-methyl-4-quinolyl)-3-(2-thiazolyl)-

CAS 71079-47-5C₁₈H₂₁N₅S

9-Cyclopentyl-7-ethyl-6,9-dihydro-3-(3-thienyl)-5H-pyrazolo[3,4-c]-1,2,4-triazolo[4,3-a]pyridine

CAS 477529-72-9C₁₈H₂₁N₅S

3-(1-Azepanylmethyl)-6-(2-phenylvinyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole

CAS 1246086-18-9C₁₈H₂₁N₅S

1-Benzyl-4-[5-(1H-pyrazol-1-ylmethyl)-1,3-thiazol-2-yl]piperazine

CAS 956754-36-2C₁₈H₂₁N₅S

1-(4-Methylphenyl)-6-(methylsulfanyl)-4-piperidino-1H-pyrazolo[3,4-d]pyrimidine

CAS 339106-50-2C₁₈H₂₁N₅S

N-Cyclohexyl-6-(methylsulfanyl)-1-phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine

CAS 478247-63-1C₁₈H₂₁N₅S

6-(1-Methyl-1H-pyrazol-4-yl)-2-(3-(pyrrolidin-1-yl)azetidin-1-yl)benzo[d]thiazole

CAS 1161730-39-7C₁₈H₂₁N₅S

N-{2-[4-(Thiophen-2-yl)piperidin-1-yl]ethyl}pyrido[2,3-d]pyrimidin-4-amine

CAS 2380032-72-2C₁₈H₂₁N₅S

4-[2-Methyl-1-(1-methylethyl)-1H-imidazol-5-yl]-N-[4-(methylthio)phenyl]-2-pyrimidinamine

CAS 602306-74-1C₁₈H₂₁N₅S

N-{[1-(2-Methylpyridin-4-yl)piperidin-4-yl]methyl}-[1,3]thiazolo[4,5-c]pyridin-2-amine

CAS 2379953-73-6C₁₈H₂₁N₅S

N-{2-[4-(Thiophen-2-yl)piperidin-1-yl]ethyl}pyrido[3,4-d]pyrimidin-4-amine

CAS 2380044-51-7C₁₈H₂₁N₅S

$3-{3-[(1H-Imidazol-1-yl)methyl]azetidin-1-yl}-5-methyl-8-thia-4,6-diazatricyclo[7.4.0.0^{2,7}]trideca-1(9),2,4,6-tetraene chemical structure, C18H21N5S, CAS 2548981-63-9$

3-{3-[(1H-Imidazol-1-yl)methyl]azetidin-1-yl}-5-methyl-8-thia-4,6-diazatricyclo[7.4.0.0^{2,7}]trideca-1(9),2,4,6-tetraene

CAS 2548981-63-9C₁₈H₂₁N₅S

4-({4-[6-Methyl-2-(methylsulfanyl)pyrimidin-4-yl]piperazin-1-yl}methyl)benzonitrile

CAS 2548977-34-8C₁₈H₂₁N₅S

Frequently asked questions

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What is the molar mass of C18H21N5S?

The molar mass of C18H21N5S is 339.46 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 5 nitrogen atoms and 1 sulfur atom. The monoisotopic mass is 339.1518 Da.

How many compounds have the formula C18H21N5S?

CompoundList lists 40 compounds with the molecular formula C18H21N5S, including N4-isobutyl-N2-((2-phenylthiazol-4-yl)methyl)pyrimidine-2,4-diamine, Tofimilast, 6-(Benzylsulfanyl)-9-cyclohexyl-9H-purin-2-amine. 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 C18H21N5S?

C18H21N5S 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.