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Molecular formula

C18H21N3O2

434 compounds have this formula on CompoundList.

Molar mass
311.38g/mol
Monoisotopic mass
311.1634Da
Atoms
44
Elements
4
Rings plus double bonds
10

The formula C18H21N3O2 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 2 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 × 1869.43%
    12.011 × 18 = 216.198 g/mol
  • H Hydrogen × 216.80%
    1.008 × 21 = 21.168 g/mol
  • N Nitrogen × 313.49%
    14.007 × 3 = 42.021 g/mol
  • O Oxygen × 210.28%
    15.999 × 2 = 31.998 g/mol
Look up another formula

Compounds with the formula C18H21N3O2

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

Showing 401 to 434 of 434 compounds

N-(2-Ethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide chemical structure, C18H21N3O2, CAS 2415601-88-4
N-(2-Ethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide
CAS 2415601-88-4C18H21N3O2
N-(2,6-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide chemical structure, C18H21N3O2, CAS 2415513-30-1
N-(2,6-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide
CAS 2415513-30-1C18H21N3O2
N-(2,3-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide chemical structure, C18H21N3O2, CAS 2415499-64-6
N-(2,3-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide
CAS 2415499-64-6C18H21N3O2
N-(2,4-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide chemical structure, C18H21N3O2, CAS 2415556-20-4
N-(2,4-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide
CAS 2415556-20-4C18H21N3O2
N-(2,5-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide chemical structure, C18H21N3O2, CAS 2415628-33-8
N-(2,5-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide
CAS 2415628-33-8C18H21N3O2
N-[2-(2-Methoxyphenyl)ethyl]-5,6,7,8-tetrahydrocinnoline-3-carboxamide chemical structure, C18H21N3O2, CAS 2415469-39-3
N-[2-(2-Methoxyphenyl)ethyl]-5,6,7,8-tetrahydrocinnoline-3-carboxamide
CAS 2415469-39-3C18H21N3O2
2-(6-Cyclopropylpyrimidin-4-yl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline chemical structure, C18H21N3O2, CAS 2326198-55-2
2-(6-Cyclopropylpyrimidin-4-yl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline
CAS 2326198-55-2C18H21N3O2
2-{5H,6H,7H-Cyclopenta[d]pyrimidin-4-yl}-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline chemical structure, C18H21N3O2, CAS 2327319-74-2
2-{5H,6H,7H-Cyclopenta[d]pyrimidin-4-yl}-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline
CAS 2327319-74-2C18H21N3O2
4-[2-(Pyrrolidine-1-carbonyl)morpholin-4-yl]quinoline chemical structure, C18H21N3O2, CAS 2640881-20-3
4-[2-(Pyrrolidine-1-carbonyl)morpholin-4-yl]quinoline
CAS 2640881-20-3C18H21N3O2
N-[(2,3-Dihydro-1,4-benzodioxin-6-yl)methyl]-N,2-dimethyl-5H,6H,7H-cyclopenta[d]pyrimidin-4-amine chemical structure, C18H21N3O2, CAS 2741944-35-2
N-[(2,3-Dihydro-1,4-benzodioxin-6-yl)methyl]-N,2-dimethyl-5H,6H,7H-cyclopenta[d]pyrimidin-4-amine
CAS 2741944-35-2C18H21N3O2
N-[(2,3-Dihydro-1,4-benzodioxin-6-yl)methyl]-N-methyl-5,6,7,8-tetrahydroquinazolin-4-amine chemical structure, C18H21N3O2, CAS 2742031-92-9
N-[(2,3-Dihydro-1,4-benzodioxin-6-yl)methyl]-N-methyl-5,6,7,8-tetrahydroquinazolin-4-amine
CAS 2742031-92-9C18H21N3O2
2-Cyclopropyl-N-[(2,3-dihydro-1,4-benzodioxin-6-yl)methyl]-N,6-dimethylpyrimidin-4-amine chemical structure, C18H21N3O2, CAS 2742060-57-5
2-Cyclopropyl-N-[(2,3-dihydro-1,4-benzodioxin-6-yl)methyl]-N,6-dimethylpyrimidin-4-amine
CAS 2742060-57-5C18H21N3O2
6-Cyclobutyl-N-[(2,3-dihydro-1,4-benzodioxin-6-yl)methyl]-N-methylpyrimidin-4-amine chemical structure, C18H21N3O2, CAS 2742016-27-7
6-Cyclobutyl-N-[(2,3-dihydro-1,4-benzodioxin-6-yl)methyl]-N-methylpyrimidin-4-amine
CAS 2742016-27-7C18H21N3O2
2-(3-Methoxyphenyl)-5-(3-methylbutyl)-4H,5H-pyrazolo[1,5-a]pyrazin-4-one chemical structure, C18H21N3O2, CAS 2741955-50-8
2-(3-Methoxyphenyl)-5-(3-methylbutyl)-4H,5H-pyrazolo[1,5-a]pyrazin-4-one
CAS 2741955-50-8C18H21N3O2
2-(3-Methoxyphenyl)-5-pentyl-4H,5H-pyrazolo[1,5-a]pyrazin-4-one chemical structure, C18H21N3O2, CAS 2326902-06-9
2-(3-Methoxyphenyl)-5-pentyl-4H,5H-pyrazolo[1,5-a]pyrazin-4-one
CAS 2326902-06-9C18H21N3O2
2-[1-(Oxolane-2-carbonyl)piperidin-4-yl]-1,8-naphthyridine chemical structure, C18H21N3O2, CAS 2640891-67-2
2-[1-(Oxolane-2-carbonyl)piperidin-4-yl]-1,8-naphthyridine
CAS 2640891-67-2C18H21N3O2
N,N-Dimethyl-3-{3-[(2-methylpyridin-4-yl)oxy]azetidine-1-carbonyl}aniline chemical structure, C18H21N3O2, CAS 2640888-83-9
N,N-Dimethyl-3-{3-[(2-methylpyridin-4-yl)oxy]azetidine-1-carbonyl}aniline
CAS 2640888-83-9C18H21N3O2
3-(4-Methoxyphenyl)-N-[1-(pyridin-2-yl)azetidin-3-yl]propanamide chemical structure, C18H21N3O2, CAS 2415620-53-8
3-(4-Methoxyphenyl)-N-[1-(pyridin-2-yl)azetidin-3-yl]propanamide
CAS 2415620-53-8C18H21N3O2
2-(4-Ethoxyphenyl)-N-[1-(pyridin-2-yl)azetidin-3-yl]acetamide chemical structure, C18H21N3O2, CAS 2415518-57-7
2-(4-Ethoxyphenyl)-N-[1-(pyridin-2-yl)azetidin-3-yl]acetamide
CAS 2415518-57-7C18H21N3O2
N-{2-Hydroxy-2-[4-(1H-pyrazol-1-yl)phenyl]ethyl}cyclohex-3-ene-1-carboxamide chemical structure, C18H21N3O2, CAS 2415621-16-6
N-{2-Hydroxy-2-[4-(1H-pyrazol-1-yl)phenyl]ethyl}cyclohex-3-ene-1-carboxamide
CAS 2415621-16-6C18H21N3O2
1-(2-Methoxypyridin-4-yl)-4-[(2-methylphenyl)methyl]piperazin-2-one chemical structure, C18H21N3O2, CAS 2741919-56-0
1-(2-Methoxypyridin-4-yl)-4-[(2-methylphenyl)methyl]piperazin-2-one
CAS 2741919-56-0C18H21N3O2
2-(Oxan-2-yl)-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one chemical structure, C18H21N3O2, CAS 2770626-70-3
2-(Oxan-2-yl)-1-{6H,7H,8H,9H-pyrido[2,3-b]1,6-naphthyridin-7-yl}ethan-1-one
CAS 2770626-70-3C18H21N3O2
N-(3,4-Dimethylphenyl)-3-[(2-methylpyridin-4-yl)oxy]azetidine-1-carboxamide chemical structure, C18H21N3O2, CAS 2770600-27-4
N-(3,4-Dimethylphenyl)-3-[(2-methylpyridin-4-yl)oxy]azetidine-1-carboxamide
CAS 2770600-27-4C18H21N3O2
4-Methyl-2-[3-(morpholine-4-carbonyl)azetidin-1-yl]quinoline chemical structure, C18H21N3O2, CAS 2770592-78-2
4-Methyl-2-[3-(morpholine-4-carbonyl)azetidin-1-yl]quinoline
CAS 2770592-78-2C18H21N3O2

Frequently asked questions

What is the molar mass of C18H21N3O2?

The molar mass of C18H21N3O2 is 311.38 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 311.1634 Da.

How many compounds have the formula C18H21N3O2?

CompoundList lists 434 compounds with the molecular formula C18H21N3O2, including N-(2-Ethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide, N-(2,6-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide, N-(2,3-Dimethylphenyl)-6-(oxan-4-yl)pyrimidine-4-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 C18H21N3O2?

C18H21N3O2 has a degree of unsaturation of 10. 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.