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Molecular formula

C20H21FN2O

34 compounds have this formula on CompoundList.

Molar mass
324.40g/mol
Monoisotopic mass
330.2015Da
Atoms
45
Elements
5
Rings plus double bonds
11

The formula C20H21FN2O describes a molecule made of 20 carbon atoms, 21 hydrogen atoms, 1 fluorine atom, 2 nitrogen atoms and 1 oxygen 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 × 2074.05%
    12.011 × 20 = 240.220 g/mol
  • H Hydrogen × 216.53%
    1.008 × 21 = 21.168 g/mol
  • F Fluorine × 15.86%
    18.998 × 1 = 18.998 g/mol
  • N Nitrogen × 28.64%
    14.007 × 2 = 28.014 g/mol
  • O Oxygen × 14.93%
    15.999 × 1 = 15.999 g/mol
Look up another formula

Compounds with the formula C20H21FN2O

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

Showing 1 to 34 of 34 compounds

Citalopram chemical structure, C20H21FN2O, CAS 59729-33-8
Citalopram
CAS 59729-33-8C20H21FN2O
Escitalopram chemical structure, C20H21FN2O, CAS 128196-01-0
Escitalopram
CAS 128196-01-0C20H21FN2O
(-)-Citalopram chemical structure, C20H21FN2O, CAS 128196-02-1
(-)-Citalopram
CAS 128196-02-1C20H21FN2O
Citalopram-d6 chemical structure, C20H21FN2O, CAS 1190003-26-9
Citalopram-d6
CAS 1190003-26-9C20H21FN2O
(Z)-1-[4-(2-Fluorophenyl)piperazin-1-yl]-2-methyl-3-phenylprop-2-en-1-one chemical structure, C20H21FN2O, CAS 599188-97-3
(Z)-1-[4-(2-Fluorophenyl)piperazin-1-yl]-2-methyl-3-phenylprop-2-en-1-one
CAS 599188-97-3C20H21FN2O
N-[1-(4-Fluorophenyl)ethyl]-4-(1H-indol-3-yl)butanamide chemical structure, C20H21FN2O, CAS 849127-84-0
N-[1-(4-Fluorophenyl)ethyl]-4-(1H-indol-3-yl)butanamide
CAS 849127-84-0C20H21FN2O
1-(2-Fluorophenyl)-4-(3-(3-methylphenyl)acryloyl)piperazine chemical structure, C20H21FN2O, CAS 329779-85-3
1-(2-Fluorophenyl)-4-(3-(3-methylphenyl)acryloyl)piperazine
CAS 329779-85-3C20H21FN2O
[4-(2-Fluorophenyl)piperazin-1-yl](2-phenylcyclopropyl)methanone chemical structure, C20H21FN2O, CAS 438475-24-2
[4-(2-Fluorophenyl)piperazin-1-yl](2-phenylcyclopropyl)methanone
CAS 438475-24-2C20H21FN2O
(E)-1-[4-[(3-Fluorophenyl)methyl]piperazin-1-yl]-3-phenylprop-2-en-1-one chemical structure, C20H21FN2O, CAS 1684444-27-6
(E)-1-[4-[(3-Fluorophenyl)methyl]piperazin-1-yl]-3-phenylprop-2-en-1-one
CAS 1684444-27-6C20H21FN2O
(4-Fluorophenyl)-[4-[(E)-3-phenylprop-2-enyl]piperazin-1-yl]methanone chemical structure, C20H21FN2O, CAS 219988-92-8
(4-Fluorophenyl)-[4-[(E)-3-phenylprop-2-enyl]piperazin-1-yl]methanone
CAS 219988-92-8C20H21FN2O
N-(4-Fluorophenyl)-2,2,4,6-tetramethylquinoline-1(2H)-carboxamide chemical structure, C20H21FN2O, CAS 352660-18-5
N-(4-Fluorophenyl)-2,2,4,6-tetramethylquinoline-1(2H)-carboxamide
CAS 352660-18-5C20H21FN2O
4-(4-Fluorophenyl)-1-[(1H-indol-3-yl)methyl]piperidin-4-ol chemical structure, C20H21FN2O, CAS 925217-88-5
4-(4-Fluorophenyl)-1-[(1H-indol-3-yl)methyl]piperidin-4-ol
CAS 925217-88-5C20H21FN2O
N-Phenyl-1-(5-fluoropentyl)-1H-indole-3-carboxamide chemical structure, C20H21FN2O, CAS 1776086-01-1
N-Phenyl-1-(5-fluoropentyl)-1H-indole-3-carboxamide
CAS 1776086-01-1C20H21FN2O
Escitalopram EP impurity I chemical structure, C20H21FN2O, CAS 1370643-22-3
Escitalopram EP impurity I
CAS 1370643-22-3C20H21FN2O
Quinazoline, 4-[2-[4-(1,1-dimethylethyl)phenyl]ethoxy]-8-fluoro- chemical structure, C20H21FN2O, CAS 124428-20-2
Quinazoline, 4-[2-[4-(1,1-dimethylethyl)phenyl]ethoxy]-8-fluoro-
CAS 124428-20-2C20H21FN2O
(E)-1-[4-[(4-Fluorophenyl)methyl]piperazin-1-yl]-3-phenylprop-2-en-1-one chemical structure, C20H21FN2O, CAS 1684444-35-6
(E)-1-[4-[(4-Fluorophenyl)methyl]piperazin-1-yl]-3-phenylprop-2-en-1-one
CAS 1684444-35-6C20H21FN2O
N-(4-(Benzyl(methyl)amino)but-2-yn-1-yl)-2-(4-fluorophenyl)acetamide chemical structure, C20H21FN2O, CAS 1396577-96-0
N-(4-(Benzyl(methyl)amino)but-2-yn-1-yl)-2-(4-fluorophenyl)acetamide
CAS 1396577-96-0C20H21FN2O
2-Propen-1-one, 1-(4-fluorophenyl)-2-methyl-3-(4-phenyl-1-piperazinyl)- chemical structure, C20H21FN2O, CAS 65201-22-1
2-Propen-1-one, 1-(4-fluorophenyl)-2-methyl-3-(4-phenyl-1-piperazinyl)-
CAS 65201-22-1C20H21FN2O
Escitalopram impurity 54 chemical structure, C20H21FN2O, CAS 1370643-23-4
Escitalopram impurity 54
CAS 1370643-23-4C20H21FN2O
Citalopram olefinic impurity chemical structure, C20H21FN2O, CAS 920282-75-3
Citalopram olefinic impurity
CAS 920282-75-3C20H21FN2O
Ethanone, 2-(diethylamino)-1-(2-(4-fluorophenyl)-1H-indol-3-yl)- chemical structure, C20H21FN2O, CAS 70093-23-1
Ethanone, 2-(diethylamino)-1-(2-(4-fluorophenyl)-1H-indol-3-yl)-
CAS 70093-23-1C20H21FN2O
(2E)-1-[4-(4-Fluorophenyl)piperazinyl]-3-(3-methylphenyl)prop-2-en-1-one chemical structure, C20H21FN2O, CAS 329779-87-5
(2E)-1-[4-(4-Fluorophenyl)piperazinyl]-3-(3-methylphenyl)prop-2-en-1-one
CAS 329779-87-5C20H21FN2O
Citalopram-d4 chemical structure, C20H21FN2O, CAS 1219908-84-5
Citalopram-d4
CAS 1219908-84-5C20H21FN2O
1-(3-(3,4-Dihydroisoquinolin-2(1H)-yl)azetidin-1-yl)-2-(4-fluorophenyl)ethanone chemical structure, C20H21FN2O, CAS 2034525-84-1
1-(3-(3,4-Dihydroisoquinolin-2(1H)-yl)azetidin-1-yl)-2-(4-fluorophenyl)ethanone
CAS 2034525-84-1C20H21FN2O

Frequently asked questions

What is the molar mass of C20H21FN2O?

The molar mass of C20H21FN2O is 324.40 g/mol, calculated from standard atomic weights for 20 carbon atoms, 21 hydrogen atoms, 1 fluorine atom, 2 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 330.2015 Da.

How many compounds have the formula C20H21FN2O?

CompoundList lists 34 compounds with the molecular formula C20H21FN2O, including Citalopram, Escitalopram, (-)-Citalopram. 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 C20H21FN2O?

C20H21FN2O has a degree of unsaturation of 11. 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.