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Molecular formula

C21H18N4O3S

126 compounds have this formula on CompoundList.

Molar mass
406.46g/mol
Monoisotopic mass
406.1100Da
Atoms
47
Elements
5
Rings plus double bonds
15

The formula C21H18N4O3S describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 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 × 2162.06%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 184.46%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 413.78%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 311.81%
    15.999 × 3 = 47.997 g/mol
  • S Sulfur × 17.89%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C21H18N4O3S

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

Showing 101 to 126 of 126 compounds

N-{2-[(4-Methoxyphenyl)amino]-2-oxoethyl}-2-(1H-pyrrol-1-yl)-1,3-benzothiazole-6-carboxamide chemical structure, C21H18N4O3S, CAS 1010913-28-6
N-{2-[(4-Methoxyphenyl)amino]-2-oxoethyl}-2-(1H-pyrrol-1-yl)-1,3-benzothiazole-6-carboxamide
CAS 1010913-28-6C21H18N4O3S
1-(4-Methoxyphenyl)-3-(4-(7-methyl-5-oxo-5H-thiazolo[3,2-a]pyrimidin-3-yl)phenyl)urea chemical structure, C21H18N4O3S, CAS 1105247-06-0
1-(4-Methoxyphenyl)-3-(4-(7-methyl-5-oxo-5H-thiazolo[3,2-a]pyrimidin-3-yl)phenyl)urea
CAS 1105247-06-0C21H18N4O3S
3-Allyl-1-((3-(4-(methylthio)phenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione chemical structure, C21H18N4O3S, CAS 1207033-60-0
3-Allyl-1-((3-(4-(methylthio)phenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione
CAS 1207033-60-0C21H18N4O3S
N-(4-Ethoxyphenyl)-2-((3-phenyl-1,2,4-oxadiazol-5-yl)methyl)thiazole-4-carboxamide chemical structure, C21H18N4O3S, CAS 1251602-18-2
N-(4-Ethoxyphenyl)-2-((3-phenyl-1,2,4-oxadiazol-5-yl)methyl)thiazole-4-carboxamide
CAS 1251602-18-2C21H18N4O3S
N-(5-(2-(1H-Indol-1-yl)acetyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)furan-3-carboxamide chemical structure, C21H18N4O3S, CAS 1448065-42-6
N-(5-(2-(1H-Indol-1-yl)acetyl)-4,5,6,7-tetrahydrothiazolo[5,4-c]pyridin-2-yl)furan-3-carboxamide
CAS 1448065-42-6C21H18N4O3S
N-(2-((3-(Thiophen-2-yl)-1,2,4-oxadiazol-5-yl)methyl)phenyl)-4,5,6,7-tetrahydrobenzo[d]isoxazole-3-carboxamide chemical structure, C21H18N4O3S, CAS 1705818-78-5
N-(2-((3-(Thiophen-2-yl)-1,2,4-oxadiazol-5-yl)methyl)phenyl)-4,5,6,7-tetrahydrobenzo[d]isoxazole-3-carboxamide
CAS 1705818-78-5C21H18N4O3S
N-([2,4'-Bipyridin]-4-ylmethyl)-4-(2-methyloxazol-4-yl)benzenesulfonamide chemical structure, C21H18N4O3S, CAS 2034322-61-5
N-([2,4'-Bipyridin]-4-ylmethyl)-4-(2-methyloxazol-4-yl)benzenesulfonamide
CAS 2034322-61-5C21H18N4O3S
3-(1-(5-(Thiophen-2-yl)isoxazole-3-carbonyl)piperidin-3-yl)quinazolin-4(3H)-one chemical structure, C21H18N4O3S, CAS 2034463-06-2
3-(1-(5-(Thiophen-2-yl)isoxazole-3-carbonyl)piperidin-3-yl)quinazolin-4(3H)-one
CAS 2034463-06-2C21H18N4O3S
(4-((1,3,4-Thiadiazol-2-yl)oxy)piperidin-1-yl)(3-phenylbenzo[c]isoxazol-5-yl)methanone chemical structure, C21H18N4O3S, CAS 2191404-84-7
(4-((1,3,4-Thiadiazol-2-yl)oxy)piperidin-1-yl)(3-phenylbenzo[c]isoxazol-5-yl)methanone
CAS 2191404-84-7C21H18N4O3S
(6E)-5-Imino-2-methyl-6-[[2-(2-phenoxyethoxy)phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one chemical structure, C21H18N4O3S, CAS 433244-46-3
(6E)-5-Imino-2-methyl-6-[[2-(2-phenoxyethoxy)phenyl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
CAS 433244-46-3C21H18N4O3S
2-(2,4-Dioxo-3-(thiophen-2-ylmethyl)-3,4-dihydropyrido[3,2-d]pyrimidin-1(2H)-yl)-N-(o-tolyl)acetamide chemical structure, C21H18N4O3S, CAS 955521-90-1
2-(2,4-Dioxo-3-(thiophen-2-ylmethyl)-3,4-dihydropyrido[3,2-d]pyrimidin-1(2H)-yl)-N-(o-tolyl)acetamide
CAS 955521-90-1C21H18N4O3S
N-Benzyl-2-(2,4-dioxo-3-(thiophen-2-ylmethyl)-3,4-dihydropyrido[3,2-d]pyrimidin-1(2H)-yl)acetamide chemical structure, C21H18N4O3S, CAS 955800-89-2
N-Benzyl-2-(2,4-dioxo-3-(thiophen-2-ylmethyl)-3,4-dihydropyrido[3,2-d]pyrimidin-1(2H)-yl)acetamide
CAS 955800-89-2C21H18N4O3S
3-Methyl-N-(4-methylbenzyl)-6-(3-nitrophenyl)imidazo[2,1-b]thiazole-2-carboxamide chemical structure, C21H18N4O3S, CAS 1005300-83-3
3-Methyl-N-(4-methylbenzyl)-6-(3-nitrophenyl)imidazo[2,1-b]thiazole-2-carboxamide
CAS 1005300-83-3C21H18N4O3S
N-(3,4-Dimethylphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carboxamide chemical structure, C21H18N4O3S, CAS 1005300-87-7
N-(3,4-Dimethylphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b][1,3]thiazole-2-carboxamide
CAS 1005300-87-7C21H18N4O3S
N-(2-Ethylphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b]thiazole-2-carboxamide chemical structure, C21H18N4O3S, CAS 1005302-79-3
N-(2-Ethylphenyl)-3-methyl-6-(3-nitrophenyl)imidazo[2,1-b]thiazole-2-carboxamide
CAS 1005302-79-3C21H18N4O3S
1H-Indole-5-sulfonamide, 2,3-dihydro-1-methyl-2-oxo-N-[4-(2-phenyldiazenyl)phenyl]- chemical structure, C21H18N4O3S, CAS 1111549-37-1
1H-Indole-5-sulfonamide, 2,3-dihydro-1-methyl-2-oxo-N-[4-(2-phenyldiazenyl)phenyl]-
CAS 1111549-37-1C21H18N4O3S
N-(3-(Benzo[d]thiazol-2-yl)phenyl)-3-(6-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)propanamide chemical structure, C21H18N4O3S, CAS 1105202-63-8
N-(3-(Benzo[d]thiazol-2-yl)phenyl)-3-(6-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)propanamide
CAS 1105202-63-8C21H18N4O3S
3-Methyl-6-(3-nitrophenyl)-N-(1-phenylethyl)imidazo[2,1-b]thiazole-2-carboxamide chemical structure, C21H18N4O3S, CAS 920479-08-9
3-Methyl-6-(3-nitrophenyl)-N-(1-phenylethyl)imidazo[2,1-b]thiazole-2-carboxamide
CAS 920479-08-9C21H18N4O3S
3-(1-(Benzo[d]thiazole-2-carbonyl)piperidin-4-yl)quinazoline-2,4(1H,3H)-dione chemical structure, C21H18N4O3S, CAS 1903717-87-2
3-(1-(Benzo[d]thiazole-2-carbonyl)piperidin-4-yl)quinazoline-2,4(1H,3H)-dione
CAS 1903717-87-2C21H18N4O3S
3-Cyclopropyl-1-((3-(4-(methylthio)phenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione chemical structure, C21H18N4O3S, CAS 2210140-24-0
3-Cyclopropyl-1-((3-(4-(methylthio)phenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione
CAS 2210140-24-0C21H18N4O3S
1,2,3,4-Tetrahydro-6-[2-(6-methoxy-2-benzothiazolyl)diazenyl]benzo[h]quinoline-3,7-diol chemical structure, C21H18N4O3S, CAS 6054-52-0
1,2,3,4-Tetrahydro-6-[2-(6-methoxy-2-benzothiazolyl)diazenyl]benzo[h]quinoline-3,7-diol
CAS 6054-52-0C21H18N4O3S
3-Acridinecarboxamide, 9-((4-((methylsulfonyl)amino)phenyl)amino)- chemical structure, C21H18N4O3S, CAS 85304-08-1
3-Acridinecarboxamide, 9-((4-((methylsulfonyl)amino)phenyl)amino)-
CAS 85304-08-1C21H18N4O3S
6-Quinolinesulfonamide, 1,2,3,4-tetrahydro-2-oxo-N-[4-(2-phenyldiazenyl)phenyl]- chemical structure, C21H18N4O3S, CAS 1287272-65-4
6-Quinolinesulfonamide, 1,2,3,4-tetrahydro-2-oxo-N-[4-(2-phenyldiazenyl)phenyl]-
CAS 1287272-65-4C21H18N4O3S
3-[[4-(6-Methylthieno[2,3-d]pyrimidin-4-yl)-1-piperazinyl]carbonyl]-2H-1-benzopyran-2-one chemical structure, C21H18N4O3S, CAS 1216710-84-7
3-[[4-(6-Methylthieno[2,3-d]pyrimidin-4-yl)-1-piperazinyl]carbonyl]-2H-1-benzopyran-2-one
CAS 1216710-84-7C21H18N4O3S

Frequently asked questions

What is the molar mass of C21H18N4O3S?

The molar mass of C21H18N4O3S is 406.46 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms, 3 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 406.1100 Da.

How many compounds have the formula C21H18N4O3S?

CompoundList lists 126 compounds with the molecular formula C21H18N4O3S, including N-{2-[(4-Methoxyphenyl)amino]-2-oxoethyl}-2-(1H-pyrrol-1-yl)-1,3-benzothiazole-6-carboxamide, 1-(4-Methoxyphenyl)-3-(4-(7-methyl-5-oxo-5H-thiazolo[3,2-a]pyrimidin-3-yl)phenyl)urea, 3-Allyl-1-((3-(4-(methylthio)phenyl)-1,2,4-oxadiazol-5-yl)methyl)quinazoline-2,4(1H,3H)-dione. 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 C21H18N4O3S?

C21H18N4O3S has a degree of unsaturation of 15. 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.