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Molecular formula

C21H18N4O4

118 compounds have this formula on CompoundList.

Molar mass
390.40g/mol
Monoisotopic mass
390.1328Da
Atoms
47
Elements
4
Rings plus double bonds
15

The formula C21H18N4O4 describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 4 oxygen atoms. 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 × 2164.61%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 184.65%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 414.35%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 416.39%
    15.999 × 4 = 63.996 g/mol
Look up another formula

Compounds with the formula C21H18N4O4

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

Showing 101 to 118 of 118 compounds

N-[(Z)-[1-(4-Methylphenyl)-2-phenylethylidene]amino]-2,4-dinitroaniline chemical structure, C21H18N4O4, CAS 2001-27-6
N-[(Z)-[1-(4-Methylphenyl)-2-phenylethylidene]amino]-2,4-dinitroaniline
CAS 2001-27-6C21H18N4O4
(2E)-1-(2,4-Dinitrophenyl)-2-[1-(4-methylphenyl)-2-phenylethylidene]hydrazine chemical structure, C21H18N4O4
(2E)-1-(2,4-Dinitrophenyl)-2-[1-(4-methylphenyl)-2-phenylethylidene]hydrazine
C21H18N4O4
5-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,3-triazole-4-carboxylic acid chemical structure, C21H18N4O4, CAS 2137972-17-7
5-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,3-triazole-4-carboxylic acid
CAS 2137972-17-7C21H18N4O4
7-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]pyrazine-3-carboxylic acid chemical structure, C21H18N4O4, CAS 2137825-61-5
7-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]pyrazine-3-carboxylic acid
CAS 2137825-61-5C21H18N4O4
4-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-4H,5H,6H,7H-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylic acid chemical structure, C21H18N4O4, CAS 2243507-45-9
4-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-4H,5H,6H,7H-[1,2,4]triazolo[1,5-a]pyrimidine-2-carboxylic acid
CAS 2243507-45-9C21H18N4O4
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-methyl-1-[2-(propan-2-yl)phenyl]-1H-1,2,4-triazole-3-carboxylate chemical structure, C21H18N4O4, CAS 2248333-46-0
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 5-methyl-1-[2-(propan-2-yl)phenyl]-1H-1,2,4-triazole-3-carboxylate
CAS 2248333-46-0C21H18N4O4
5-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-2-yl)-1H-1,2,3-triazole-4-carboxylic acid chemical structure, C21H18N4O4, CAS 2137970-59-1
5-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-2-yl)-1H-1,2,3-triazole-4-carboxylic acid
CAS 2137970-59-1C21H18N4O4
2-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-2H-1,2,3-triazole-4-carboxylic acid chemical structure, C21H18N4O4, CAS 2580188-83-4
2-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-2H-1,2,3-triazole-4-carboxylic acid
CAS 2580188-83-4C21H18N4O4
8-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]pyrimidine-3-carboxylic acid chemical structure, C21H18N4O4, CAS 2639409-56-4
8-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]pyrimidine-3-carboxylic acid
CAS 2639409-56-4C21H18N4O4
4-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-4H,5H,6H,7H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylic acid chemical structure, C21H18N4O4, CAS 2639450-13-6
4-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-4H,5H,6H,7H-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylic acid
CAS 2639450-13-6C21H18N4O4
3-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,4-triazole-5-carboxylic acid chemical structure, C21H18N4O4, CAS 2639464-32-5
3-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,4-triazole-5-carboxylic acid
CAS 2639464-32-5C21H18N4O4
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-cyclopropyl-1-(propan-2-yl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylate chemical structure, C21H18N4O4, CAS 2248280-47-7
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 6-cyclopropyl-1-(propan-2-yl)-1H-pyrazolo[3,4-b]pyridine-4-carboxylate
CAS 2248280-47-7C21H18N4O4
(9H-Fluoren-9-yl)methyl 3-(5-nitro-1H-pyrazol-1-yl)azetidine-1-carboxylate chemical structure, C21H18N4O4, CAS 2680744-19-6
(9H-Fluoren-9-yl)methyl 3-(5-nitro-1H-pyrazol-1-yl)azetidine-1-carboxylate
CAS 2680744-19-6C21H18N4O4
5-[(2,3-Dihydro-1H-indol-5-yl)amino]-2-(2,6-dioxopiperidin-3-yl)-2,3-dihydro-1H-isoindole-1,3-dione chemical structure, C21H18N4O4, CAS 2703760-61-4
5-[(2,3-Dihydro-1H-indol-5-yl)amino]-2-(2,6-dioxopiperidin-3-yl)-2,3-dihydro-1H-isoindole-1,3-dione
CAS 2703760-61-4C21H18N4O4
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-(3-cyano-6-methylpyridin-2-yl)piperidine-3-carboxylate chemical structure, C21H18N4O4, CAS 2248290-93-7
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-(3-cyano-6-methylpyridin-2-yl)piperidine-3-carboxylate
CAS 2248290-93-7C21H18N4O4
1-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,4-triazole-5-carboxylic acid chemical structure, C21H18N4O4, CAS 2913416-14-3
1-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,4-triazole-5-carboxylic acid
CAS 2913416-14-3C21H18N4O4
Benzenecarboximidic acid,N-(phenylmethyl)-,2-(4-nitrophenyl)hydrazide chemical structure, C21H18N4O4, CAS 137267-52-8
Benzenecarboximidic acid,N-(phenylmethyl)-,2-(4-nitrophenyl)hydrazide
CAS 137267-52-8C21H18N4O4
7-(9H-Fluoren-9-ylmethoxycarbonyl)-6,8-dihydro-5H-[1,2,4]triazolo[1,5-a]pyrazine-6-carboxylic acid chemical structure, C21H18N4O4, CAS 3048596-28-4
7-(9H-Fluoren-9-ylmethoxycarbonyl)-6,8-dihydro-5H-[1,2,4]triazolo[1,5-a]pyrazine-6-carboxylic acid
CAS 3048596-28-4C21H18N4O4

Frequently asked questions

What is the molar mass of C21H18N4O4?

The molar mass of C21H18N4O4 is 390.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 390.1328 Da.

How many compounds have the formula C21H18N4O4?

CompoundList lists 118 compounds with the molecular formula C21H18N4O4, including N-[(Z)-[1-(4-Methylphenyl)-2-phenylethylidene]amino]-2,4-dinitroaniline, (2E)-1-(2,4-Dinitrophenyl)-2-[1-(4-methylphenyl)-2-phenylethylidene]hydrazine, 5-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-1H-1,2,3-triazole-4-carboxylic acid. 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 C21H18N4O4?

C21H18N4O4 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.