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Molecular formula

C21H18N4O5

42 compounds have this formula on CompoundList.

Molar mass
406.40g/mol
Monoisotopic mass
406.1277Da
Atoms
48
Elements
4
Rings plus double bonds
15

The formula C21H18N4O5 describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 5 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 × 2162.07%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 184.46%
    1.008 × 18 = 18.144 g/mol
  • N Nitrogen × 413.79%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 519.68%
    15.999 × 5 = 79.995 g/mol
Look up another formula

Compounds with the formula C21H18N4O5

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

Showing 1 to 42 of 42 compounds

7-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-3-oxo-2H,3H,5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]piperazine-6-carboxylic acid chemical structure, C21H18N4O5, CAS 2137493-56-0
7-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-3-oxo-2H,3H,5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]piperazine-6-carboxylic acid
CAS 2137493-56-0C21H18N4O5
4-(2-(2-Pyrazinylcarbonyl)carbohydrazonoyl)phenyl 3,4-dimethoxybenzoate chemical structure, C21H18N4O5, CAS 764653-24-9
4-(2-(2-Pyrazinylcarbonyl)carbohydrazonoyl)phenyl 3,4-dimethoxybenzoate
CAS 764653-24-9C21H18N4O5
1-({[(2H-1,3-Benzodioxol-5-yl)methyl]carbamoyl}methyl)-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide chemical structure, C21H18N4O5, CAS 946316-86-5
1-({[(2H-1,3-Benzodioxol-5-yl)methyl]carbamoyl}methyl)-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide
CAS 946316-86-5C21H18N4O5
8-(1,3-Benzodioxol-5-yloxy)-7-benzyl-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione chemical structure, C21H18N4O5, CAS 359684-71-2
8-(1,3-Benzodioxol-5-yloxy)-7-benzyl-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione
CAS 359684-71-2C21H18N4O5
Psychrophilin C chemical structure, C21H18N4O5, CAS 818377-58-1
Psychrophilin C
CAS 818377-58-1C21H18N4O5
3-(2-Methoxyethyl)-10-methyl-2-(3-nitrophenyl)pyrimido[4,5-b]quinoline-4,5(3H,10H)-dione chemical structure, C21H18N4O5, CAS 879448-35-8
3-(2-Methoxyethyl)-10-methyl-2-(3-nitrophenyl)pyrimido[4,5-b]quinoline-4,5(3H,10H)-dione
CAS 879448-35-8C21H18N4O5
5-(4-Methoxyphenyl)-1,3-dimethyl-6-(3-nitrophenyl)pyrrolo[3,4-d]pyrimidine-2,4-dione chemical structure, C21H18N4O5, CAS 693813-29-5
5-(4-Methoxyphenyl)-1,3-dimethyl-6-(3-nitrophenyl)pyrrolo[3,4-d]pyrimidine-2,4-dione
CAS 693813-29-5C21H18N4O5
N-(Furan-2-ylmethyl)-2-(5-(3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl)-2-oxopyridin-1(2H)-yl)acetamide chemical structure, C21H18N4O5, CAS 1251612-07-3
N-(Furan-2-ylmethyl)-2-(5-(3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl)-2-oxopyridin-1(2H)-yl)acetamide
CAS 1251612-07-3C21H18N4O5
1-((3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)methyl)-3-isopropylquinazoline-2,4(1H,3H)-dione chemical structure, C21H18N4O5, CAS 1105221-09-7
1-((3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)methyl)-3-isopropylquinazoline-2,4(1H,3H)-dione
CAS 1105221-09-7C21H18N4O5
7-(Diethylamino)-3-[5-(4-nitrophenyl)-1,3,4-oxadiazol-2-yl]-2H-chromen-2-one chemical structure, C21H18N4O5, CAS 313962-79-7
7-(Diethylamino)-3-[5-(4-nitrophenyl)-1,3,4-oxadiazol-2-yl]-2H-chromen-2-one
CAS 313962-79-7C21H18N4O5
1-Phenyl-3-(3-(3,4,5-trimethoxyphenyl)-1,2,4-oxadiazol-5-yl)pyridazin-4(1H)-one chemical structure, C21H18N4O5, CAS 1251681-06-7
1-Phenyl-3-(3-(3,4,5-trimethoxyphenyl)-1,2,4-oxadiazol-5-yl)pyridazin-4(1H)-one
CAS 1251681-06-7C21H18N4O5
3-(2-Methoxyethyl)-10-methyl-2-(4-nitrophenyl)pyrimido[4,5-b]quinoline-4,5(3H,10H)-dione chemical structure, C21H18N4O5, CAS 879461-05-9
3-(2-Methoxyethyl)-10-methyl-2-(4-nitrophenyl)pyrimido[4,5-b]quinoline-4,5(3H,10H)-dione
CAS 879461-05-9C21H18N4O5
1-{[(2,3-Dihydro-1,4-benzodioxin-6-yl)carbamoyl]methyl}-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide chemical structure, C21H18N4O5, CAS 946316-82-1
1-{[(2,3-Dihydro-1,4-benzodioxin-6-yl)carbamoyl]methyl}-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide
CAS 946316-82-1C21H18N4O5
5-(4-Methylbenzyl)-7-[(3-methyl-1,2,4-oxadiazol-5-yl)methyl][1,3]dioxolo[4,5-g]quinazoline-6,8(5H,7H)-dione chemical structure, C21H18N4O5, CAS 1031633-89-2
5-(4-Methylbenzyl)-7-[(3-methyl-1,2,4-oxadiazol-5-yl)methyl][1,3]dioxolo[4,5-g]quinazoline-6,8(5H,7H)-dione
CAS 1031633-89-2C21H18N4O5
3-[3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1-(3-methoxyphenyl)-1,4-dihydropyridazin-4-one chemical structure, C21H18N4O5, CAS 1251603-18-5
3-[3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-1-(3-methoxyphenyl)-1,4-dihydropyridazin-4-one
CAS 1251603-18-5C21H18N4O5
Finerenone metabolite M3 chemical structure, C21H18N4O5, CAS 2088051-09-4
Finerenone metabolite M3
CAS 2088051-09-4C21H18N4O5
Methyl 4-[6-(furan-2-yl)-8-hydroxy-6,7,9,10-tetrahydro-5H-[1,2,5]oxadiazolo[3,4-b][1,4]benzodiazepin-9-yl]benzoate chemical structure, C21H18N4O5, CAS 1170108-39-0
Methyl 4-[6-(furan-2-yl)-8-hydroxy-6,7,9,10-tetrahydro-5H-[1,2,5]oxadiazolo[3,4-b][1,4]benzodiazepin-9-yl]benzoate
CAS 1170108-39-0C21H18N4O5
N-(4-Acetamidophenyl)-2-[3-(1,3-benzodioxol-5-yl)-6-oxopyridazin-1-yl]acetamide chemical structure, C21H18N4O5, CAS 941972-74-3
N-(4-Acetamidophenyl)-2-[3-(1,3-benzodioxol-5-yl)-6-oxopyridazin-1-yl]acetamide
CAS 941972-74-3C21H18N4O5
1-(2-Methoxyphenyl)-4-((3-(3-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)pyrazine-2,3(1H,4H)-dione chemical structure, C21H18N4O5, CAS 1251619-29-0
1-(2-Methoxyphenyl)-4-((3-(3-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)pyrazine-2,3(1H,4H)-dione
CAS 1251619-29-0C21H18N4O5
1-(2-Methoxyphenyl)-4-((3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)pyrazine-2,3(1H,4H)-dione chemical structure, C21H18N4O5, CAS 1251704-85-4
1-(2-Methoxyphenyl)-4-((3-(4-methoxyphenyl)-1,2,4-oxadiazol-5-yl)methyl)pyrazine-2,3(1H,4H)-dione
CAS 1251704-85-4C21H18N4O5
7-(3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)-3-butylquinazoline-2,4(1H,3H)-dione chemical structure, C21H18N4O5, CAS 1358414-59-1
7-(3-(Benzo[d][1,3]dioxol-5-yl)-1,2,4-oxadiazol-5-yl)-3-butylquinazoline-2,4(1H,3H)-dione
CAS 1358414-59-1C21H18N4O5
(5-(Furan-2-yl)isoxazol-3-yl)(3-(3-(2-methoxybenzyl)-1,2,4-oxadiazol-5-yl)azetidin-1-yl)methanone chemical structure, C21H18N4O5, CAS 1396852-56-4
(5-(Furan-2-yl)isoxazol-3-yl)(3-(3-(2-methoxybenzyl)-1,2,4-oxadiazol-5-yl)azetidin-1-yl)methanone
CAS 1396852-56-4C21H18N4O5
N-(3-Acetamidophenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide chemical structure, C21H18N4O5, CAS 941910-62-9
N-(3-Acetamidophenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 941910-62-9C21H18N4O5
N-(4-Acetamidophenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide chemical structure, C21H18N4O5, CAS 941904-41-2
N-(4-Acetamidophenyl)-1-(3-nitrobenzyl)-2-oxo-1,2-dihydropyridine-3-carboxamide
CAS 941904-41-2C21H18N4O5

Frequently asked questions

What is the molar mass of C21H18N4O5?

The molar mass of C21H18N4O5 is 406.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 4 nitrogen atoms and 5 oxygen atoms. The monoisotopic mass is 406.1277 Da.

How many compounds have the formula C21H18N4O5?

CompoundList lists 42 compounds with the molecular formula C21H18N4O5, including 7-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-3-oxo-2H,3H,5H,6H,7H,8H-[1,2,4]triazolo[4,3-a]piperazine-6-carboxylic acid, 4-(2-(2-Pyrazinylcarbonyl)carbohydrazonoyl)phenyl 3,4-dimethoxybenzoate, 1-({[(2H-1,3-Benzodioxol-5-yl)methyl]carbamoyl}methyl)-6-oxo-N-phenyl-1,6-dihydropyridazine-3-carboxamide. 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 C21H18N4O5?

C21H18N4O5 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.