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Molecular formula

C21H18N4O4S

113 compounds have this formula on CompoundList.

Molar mass
422.46g/mol
Monoisotopic mass
422.1049Da
Atoms
48
Elements
5
Rings plus double bonds
15

The formula C21H18N4O4S describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 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 × 2159.71%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 184.29%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 413.26%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 415.15%
    15.999 × 4 = 63.996 g/mol
  • S Sulfur × 17.59%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C21H18N4O4S

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

Showing 101 to 113 of 113 compounds

(4E)-5-(4-Ethoxyphenyl)-4-[hydroxy(pyridin-4-yl)methylidene]-1-(5-methyl-1,3,4-thiadiazol-2-yl)pyrrolidine-2,3-dione chemical structure, C21H18N4O4S, CAS 627473-60-3
(4E)-5-(4-Ethoxyphenyl)-4-[hydroxy(pyridin-4-yl)methylidene]-1-(5-methyl-1,3,4-thiadiazol-2-yl)pyrrolidine-2,3-dione
CAS 627473-60-3C21H18N4O4S
4-[[4-[[2-(2-Furanyl)-6-methyl-3-pyridinyl]oxy]-2-pyridinyl]amino]benzenesulfonamide chemical structure, C21H18N4O4S, CAS 1117685-73-0
4-[[4-[[2-(2-Furanyl)-6-methyl-3-pyridinyl]oxy]-2-pyridinyl]amino]benzenesulfonamide
CAS 1117685-73-0C21H18N4O4S
2-({[3-(2H-1,3-Benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl}sulfanyl)-3-propyl-3,4-dihydroquinazolin-4-one chemical structure, C21H18N4O4S, CAS 2320539-84-0
2-({[3-(2H-1,3-Benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl}sulfanyl)-3-propyl-3,4-dihydroquinazolin-4-one
CAS 2320539-84-0C21H18N4O4S
1-[4-(8,9-Dihydro-6H-pyrido[4,3-b][1,8]naphthyridin-7-ylsulfonyl)phenyl]pyrrolidine-2,5-dione chemical structure, C21H18N4O4S, CAS 2770588-30-0
1-[4-(8,9-Dihydro-6H-pyrido[4,3-b][1,8]naphthyridin-7-ylsulfonyl)phenyl]pyrrolidine-2,5-dione
CAS 2770588-30-0C21H18N4O4S
4-[5-[[5-Imino-2-(2-methylpropyl)-7-oxo-5H-1,3,4-thiadiazolo[3,2-a]pyrimidin-6(7H)-ylidene]methyl]-2-furanyl]benzoic acid chemical structure, C21H18N4O4S, CAS 441781-24-4
4-[5-[[5-Imino-2-(2-methylpropyl)-7-oxo-5H-1,3,4-thiadiazolo[3,2-a]pyrimidin-6(7H)-ylidene]methyl]-2-furanyl]benzoic acid
CAS 441781-24-4C21H18N4O4S
5-Imino-2-phenyl-6-(2,3,4-trimethoxybenzylidene)-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one chemical structure, C21H18N4O4S, CAS 6381-03-9
5-Imino-2-phenyl-6-(2,3,4-trimethoxybenzylidene)-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
CAS 6381-03-9C21H18N4O4S
1-(4-Nitrophenyl)sulfonyl-2-(3-pyridin-2-ylpropyl)benzimidazole chemical structure, C21H18N4O4S, CAS 229468-77-3
1-(4-Nitrophenyl)sulfonyl-2-(3-pyridin-2-ylpropyl)benzimidazole
CAS 229468-77-3C21H18N4O4S
2-[(E)-(1,3-Dioxo-1-phenylbutan-2-yl)diazenyl]-N-(pyridin-4-yl)benzene-1-sulfonamide chemical structure, C21H18N4O4S, CAS 89010-59-3
2-[(E)-(1,3-Dioxo-1-phenylbutan-2-yl)diazenyl]-N-(pyridin-4-yl)benzene-1-sulfonamide
CAS 89010-59-3C21H18N4O4S
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[4-(2,5-dimethylphenyl)-5-methyl-4H-1,2,4-triazol-3-yl]sulfanyl}acetate chemical structure, C21H18N4O4S, CAS 2248343-06-6
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[4-(2,5-dimethylphenyl)-5-methyl-4H-1,2,4-triazol-3-yl]sulfanyl}acetate
CAS 2248343-06-6C21H18N4O4S
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-({4-[4-(propan-2-yl)phenyl]-4H-1,2,4-triazol-3-yl}sulfanyl)acetate chemical structure, C21H18N4O4S, CAS 2248302-64-7
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-({4-[4-(propan-2-yl)phenyl]-4H-1,2,4-triazol-3-yl}sulfanyl)acetate
CAS 2248302-64-7C21H18N4O4S
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[4-ethyl-5-(2-methylphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetate chemical structure, C21H18N4O4S, CAS 2248412-11-3
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[4-ethyl-5-(2-methylphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetate
CAS 2248412-11-3C21H18N4O4S
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[4-ethyl-5-(3-methylphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetate chemical structure, C21H18N4O4S, CAS 2248324-10-7
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-{[4-ethyl-5-(3-methylphenyl)-4H-1,2,4-triazol-3-yl]sulfanyl}acetate
CAS 2248324-10-7C21H18N4O4S
5-(4-Ethoxyphenyl)-3-hydroxy-1-(5-methyl-1,3,4-thiadiazol-2-yl)-4-(pyridine-4-carbonyl)-2,5-dihydro-1H-pyrrol-2-one chemical structure, C21H18N4O4S
5-(4-Ethoxyphenyl)-3-hydroxy-1-(5-methyl-1,3,4-thiadiazol-2-yl)-4-(pyridine-4-carbonyl)-2,5-dihydro-1H-pyrrol-2-one
C21H18N4O4S

Frequently asked questions

What is the molar mass of C21H18N4O4S?

The molar mass of C21H18N4O4S is 422.46 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms, 4 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 422.1049 Da.

How many compounds have the formula C21H18N4O4S?

CompoundList lists 113 compounds with the molecular formula C21H18N4O4S, including (4E)-5-(4-Ethoxyphenyl)-4-[hydroxy(pyridin-4-yl)methylidene]-1-(5-methyl-1,3,4-thiadiazol-2-yl)pyrrolidine-2,3-dione, 4-[[4-[[2-(2-Furanyl)-6-methyl-3-pyridinyl]oxy]-2-pyridinyl]amino]benzenesulfonamide, 2-({[3-(2H-1,3-Benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl}sulfanyl)-3-propyl-3,4-dihydroquinazolin-4-one. 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 C21H18N4O4S?

C21H18N4O4S 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.