Molecular formula

C₁₈H₂₁NO

429 compounds have this formula on CompoundList.

Molar mass: 267.37g/mol
Monoisotopic mass: 272.1937Da
Atoms: 41
Elements: 4
Rings plus double bonds: 9

The formula C18H21NO describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom 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 × 1880.86%
12.011 × 18 = 216.198 g/mol
H Hydrogen × 217.92%
1.008 × 21 = 21.168 g/mol
N Nitrogen × 15.24%
14.007 × 1 = 14.007 g/mol
O Oxygen × 15.98%
15.999 × 1 = 15.999 g/mol

Look up another formula

Compounds with the formula C18H21NO

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

Showing 401 to 429 of 429 compounds

(S)-1-([1,1'-Biphenyl]-4-ylmethyl)piperidin-3-ol

CAS 1965938-78-6C₁₈H₂₁NO

1-Phenyl-6-propoxy-1,2,3,4-tetrahydroisoquinoline

CAS 1521584-64-4C₁₈H₂₁NO

4-(1,1-Dimethylethyl)-N-phenylbenzeneacetamide

CAS 198835-90-4C₁₈H₂₁NO

N,2,4,5-Tetramethyl-N-(phenylmethyl)benzamide

CAS 2212816-79-8C₁₈H₂₁NO

2,2-Dimethyl-N-(4-methyl[1,1'-biphenyl]-3-yl)propanamide

CAS 1146127-24-3C₁₈H₂₁NO

8-(3-Isopropoxyphenyl)-1,2,3,4-tetrahydroisoquinoline

CAS 1970670-84-8C₁₈H₂₁NO

5-(4-Methoxy-2,5-dimethylphenyl)-1,2,3,4-tetrahydroquinoline

CAS 1912044-23-5C₁₈H₂₁NO

5-(4-Methoxy-2,5-dimethylphenyl)-1,2,3,4-tetrahydroisoquinoline

CAS 1912044-33-7C₁₈H₂₁NO

5-(2-Propoxyphenyl)-1,2,3,4-tetrahydroquinoline

CAS 1921380-44-0C₁₈H₂₁NO

5-(4-Isopropoxyphenyl)-2,3-dihydro-1H-inden-1-amine

CAS 1931153-67-1C₁₈H₂₁NO

2-(9-Isopropyl-9H-carbazol-3-yl)propan-2-ol

CAS 1891655-82-5C₁₈H₂₁NO

5-(4-Methoxyphenyl)-3-methyl-1,2,4,5-tetrahydro-3-benzazepine

CAS 1147090-64-9C₁₈H₂₁NO

1-(2-((4-(tert-Butyl)phenyl)amino)phenyl)ethan-1-one

CAS 1401253-53-9C₁₈H₂₁NO

3-(1,1-Dimethylethyl)-N-methyl-N-phenylbenzamide

CAS 2459913-25-6C₁₈H₂₁NO

[(2S)-1-Benzhydryl-2-methyl-azetidin-3-yl]methanol

CAS 2920319-46-4C₁₈H₂₁NO

[(2R)-1-Benzhydryl-2-methyl-azetidin-3-yl]methanol

CAS 2920320-02-9C₁₈H₂₁NO

[(2S,3R)-1-Benzhydryl-2-methylazetidin-3-yl]methanol

CAS 2920239-95-6C₁₈H₂₁NO

Benzeneacetamide, 2,4,6-trimethyl-N-(2-methylphenyl)-

CAS 2947947-06-8C₁₈H₂₁NO

rac-1-[(1R,3R)-2,2-Dimethyl-3-(2-phenoxyphenyl)cyclopropyl]methanamine

CAS 2227886-18-0C₁₈H₂₁NO

rac-(1R,3S)-3-[4-(Benzyloxy)phenyl]-2,2-dimethylcyclopropan-1-amine

CAS 2227817-20-9C₁₈H₂₁NO

rac-1-[(1R,3R)-2,2-Dimethyl-3-(4-phenoxyphenyl)cyclopropyl]methanamine

CAS 2227688-23-3C₁₈H₂₁NO

rac-1-[(1R,3R)-2,2-Dimethyl-3-(3-phenoxyphenyl)cyclopropyl]methanamine

CAS 2227904-65-4C₁₈H₂₁NO

rac-(1R,3R)-3-[2-(Benzyloxy)phenyl]-2,2-dimethylcyclopropan-1-amine

CAS 2227651-22-9C₁₈H₂₁NO

2-(4'-Methoxy-2'-methyl-[1,1'-biphenyl]-4-yl)pyrrolidine

CAS 2432769-04-3C₁₈H₂₁NO

Frequently asked questions

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What is the molar mass of C18H21NO?

The molar mass of C18H21NO is 267.37 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 1 oxygen atom. The monoisotopic mass is 272.1937 Da.

How many compounds have the formula C18H21NO?

CompoundList lists 429 compounds with the molecular formula C18H21NO, including (S)-1-([1,1'-Biphenyl]-4-ylmethyl)piperidin-3-ol, 1-Phenyl-6-propoxy-1,2,3,4-tetrahydroisoquinoline, 4-(1,1-Dimethylethyl)-N-phenylbenzeneacetamide. 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 C18H21NO?

C18H21NO has a degree of unsaturation of 9. 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.