Molecular formula

C₂₁H₁₈N₂O₃S

140 compounds have this formula on CompoundList.

Molar mass: 378.45g/mol
Monoisotopic mass: 378.1038Da
Atoms: 45
Elements: 5
Rings plus double bonds: 14

The formula C21H18N2O3S describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms, 3 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 × 2166.65%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 184.79%
1.008 × 18 = 18.144 g/mol
N Nitrogen × 27.40%
14.007 × 2 = 28.014 g/mol
O Oxygen × 312.68%
15.999 × 3 = 47.997 g/mol
S Sulfur × 18.47%
32.06 × 1 = 32.060 g/mol

Look up another formula

Compounds with the formula C21H18N2O3S

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

Showing 101 to 140 of 140 compounds

[6-(5-Methyl-2-phenyl-thiazol-4-ylmethoxy)-indol-1-yl]-acetic acid

CAS 820959-80-6C₂₁H₁₈N₂O₃S

N-[4-(2,3-Dihydro-1H-indol-1-ylcarbonyl)phenyl]benzenesulfonamide

CAS 928884-83-7C₂₁H₁₈N₂O₃S

(Z)-3-(2,4-Dimethoxyphenyl)-2-(4-(3-methoxyphenyl)thiazol-2-yl)acrylonitrile

CAS 476671-69-9C₂₁H₁₈N₂O₃S

(Z)-3-(2,5-Dimethoxyphenyl)-2-(4-(3-methoxyphenyl)thiazol-2-yl)acrylonitrile

CAS 476671-81-5C₂₁H₁₈N₂O₃S

N-(1-Methyl-2-oxoindolin-5-yl)-[1,1'-biphenyl]-4-sulfonamide

CAS 921559-71-9C₂₁H₁₈N₂O₃S

$3-[10-Methoxy-7-(thiophen-2-yl)-8-oxa-5,6-diazatricyclo[7.4.0.0^{2,6}]trideca-1(9),4,10,12-tetraen-4-yl]phenol chemical structure, C21H18N2O3S, CAS 941941-99-7$

3-[10-Methoxy-7-(thiophen-2-yl)-8-oxa-5,6-diazatricyclo[7.4.0.0^{2,6}]trideca-1(9),4,10,12-tetraen-4-yl]phenol

CAS 941941-99-7C₂₁H₁₈N₂O₃S

N-((5-(Benzofuran-2-yl)isoxazol-3-yl)methyl)-2-(ethylthio)benzamide

CAS 1105243-41-1C₂₁H₁₈N₂O₃S

$N-{9-Ethyl-10-oxo-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaen-13-yl}-2-(thiophen-2-yl)acetamide chemical structure, C21H18N2O3S, CAS 921890-21-3$

N-{9-Ethyl-10-oxo-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaen-13-yl}-2-(thiophen-2-yl)acetamide

CAS 921890-21-3C₂₁H₁₈N₂O₃S

$N-{6,9-Dimethyl-10-oxo-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaen-13-yl}-2-(thiophen-2-yl)acetamide chemical structure, C21H18N2O3S, CAS 922060-83-1$

N-{6,9-Dimethyl-10-oxo-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,12,14-hexaen-13-yl}-2-(thiophen-2-yl)acetamide

CAS 922060-83-1C₂₁H₁₈N₂O₃S

(Z)-2-(3,4-Dimethylphenyl)-N-(7-(prop-2-yn-1-yl)-[1,3]dioxolo[4',5':4,5]benzo[1,2-d]thiazol-6(7H)-ylidene)acetamide

CAS 1005994-68-2C₂₁H₁₈N₂O₃S

N-(Diphenylcarbamoyl)-2-phenylethene-1-sulfonamide

CAS 56752-95-5C₂₁H₁₈N₂O₃S

N-(Furan-2-ylmethyl)-5-phenyl-N-(2-(thiophen-2-yl)ethyl)isoxazole-3-carboxamide

CAS 1396748-98-3C₂₁H₁₈N₂O₃S

(E)-3-(Furan-3-yl)-N-(2-(thiophene-2-carbonyl)-1,2,3,4-tetrahydroisoquinolin-7-yl)acrylamide

CAS 1448139-91-0C₂₁H₁₈N₂O₃S

1'-(2-Methylbenzo[d]thiazole-6-carbonyl)-3H-spiro[isobenzofuran-1,3'-piperidin]-3-one

CAS 1798029-54-5C₂₁H₁₈N₂O₃S

(E)-3-(3-Ethoxy-4-hydroxyphenyl)-2-(4-(3-methoxyphenyl)thiazol-2-yl)acrylonitrile

CAS 476671-28-0C₂₁H₁₈N₂O₃S

2-Methoxy-4-(5-(thiophen-3-yl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazin-2-yl)phenol

CAS 899746-15-7C₂₁H₁₈N₂O₃S

$2-[10-Methoxy-7-(thiophen-3-yl)-8-oxa-5,6-diazatricyclo[7.4.0.0^{2,6}]trideca-1(9),4,10,12-tetraen-4-yl]phenol chemical structure, C21H18N2O3S, CAS 899746-70-4$

2-[10-Methoxy-7-(thiophen-3-yl)-8-oxa-5,6-diazatricyclo[7.4.0.0^{2,6}]trideca-1(9),4,10,12-tetraen-4-yl]phenol

CAS 899746-70-4C₂₁H₁₈N₂O₃S

2-(2-Nitrophenyl)-N-[4-(phenylsulfanylmethyl)phenyl]acetamide

CAS 694499-75-7C₂₁H₁₈N₂O₃S

3-({(2Z,5E)-3-Ethyl-4-oxo-5-[(2E)-3-phenylprop-2-en-1-ylidene]-1,3-thiazolidin-2-ylidene}amino)benzoic acid

CAS 591762-96-8C₂₁H₁₈N₂O₃S

N-Benzyl-N-(4-methoxy-7-methylbenzo[d]thiazol-2-yl)furan-2-carboxamide

CAS 899735-12-7C₂₁H₁₈N₂O₃S

[4-(Phenylcarbamoyl)phenyl]methyl 2-(methylsulfanyl)pyridine-3-carboxylate

CAS 927035-97-0C₂₁H₁₈N₂O₃S

N-[2-(1,3-Benzoxazol-2-yl)ethyl][1,1'-biphenyl]-4-sulfonamide

CAS 926283-46-7C₂₁H₁₈N₂O₃S

(Z)-3-(2,3-Dimethoxyphenyl)-2-(4-(4-methoxyphenyl)thiazol-2-yl)acrylonitrile

CAS 476671-42-8C₂₁H₁₈N₂O₃S

N-(4-(7-Ethoxybenzofuran-2-yl)thiazol-2-yl)-4-methylbenzamide

CAS 921797-42-4C₂₁H₁₈N₂O₃S

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What is the molar mass of C21H18N2O3S?

The molar mass of C21H18N2O3S is 378.45 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 2 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 378.1038 Da.

How many compounds have the formula C21H18N2O3S?

CompoundList lists 140 compounds with the molecular formula C21H18N2O3S, including [6-(5-Methyl-2-phenyl-thiazol-4-ylmethoxy)-indol-1-yl]-acetic acid, N-[4-(2,3-Dihydro-1H-indol-1-ylcarbonyl)phenyl]benzenesulfonamide, (Z)-3-(2,4-Dimethoxyphenyl)-2-(4-(3-methoxyphenyl)thiazol-2-yl)acrylonitrile. 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 C21H18N2O3S?

C21H18N2O3S has a degree of unsaturation of 14. 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.