Molecular formula
C18H21NO3
637 compounds have this formula on CompoundList.
- Molar mass
- 299.37g/mol
- Monoisotopic mass
- 305.1898Da
- Atoms
- 43
- Elements
- 4
- Rings plus double bonds
- 9
The formula C18H21NO3 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 3 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 × 1872.22%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 217.07%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.68%14.007 × 1 = 14.007 g/mol
- O Oxygen × 316.03%15.999 × 3 = 47.997 g/mol
Look up another formula
Compounds with the formula C18H21NO3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 637 compounds
2-(2,4-Dimethylphenoxy)-N-(2-methoxy-5-methylphenyl)acetamide
CAS 423151-83-1C18H21NO3
4-Butoxy-N-(2-methoxyphenyl)benzamide
CAS 347906-97-2C18H21NO3
![3-[(2-Phenylethyl)carbamoyl]bicyclo[2.2.2]oct-5-ene-2-carboxylic acid chemical structure, C18H21NO3, CAS 1005245-99-7](/s/NEISDTGMCMNXAJ-UHFFFAOYSA-N.svg)
3-[(2-Phenylethyl)carbamoyl]bicyclo[2.2.2]oct-5-ene-2-carboxylic acid
CAS 1005245-99-7C18H21NO3
N-Cyclohexyl-7-methoxy-1-benzoxepine-4-carboxamide
CAS 950286-01-8C18H21NO3
N-(4-(2-Methoxyphenoxy)but-2-yn-1-yl)cyclohex-3-enecarboxamide
CAS 1426315-00-5C18H21NO3
4-Ethyl-N-(3,4,5-trimethoxybenzylidene)aniline
CAS 151221-91-9C18H21NO3
7-(3-Cyclohexylpropyl)-8-hydroxyquinoline-5,6-dione
CAS 35073-59-7C18H21NO3
N-(3-Hydroxy-4-(hydroxymethyl)cyclopentyl)-2-(naphthalen-1-yl)acetamide
CAS 1421498-14-7C18H21NO3
Anthranilic acid, N-(1-adamantanoyl)-
CAS 32639-99-9C18H21NO3
3-(4-Methoxyphenyl)-N-(2-phenoxyethyl)propanamide
CAS 899368-14-0C18H21NO3
![1-{4-[(3-Aminophenyl)methoxy]-2-hydroxy-3-propylphenyl}ethan-1-one chemical structure, C18H21NO3, CAS 104013-60-7](/s/ITCMHBZPGGTAMF-UHFFFAOYSA-N.svg)
1-{4-[(3-Aminophenyl)methoxy]-2-hydroxy-3-propylphenyl}ethan-1-one
CAS 104013-60-7C18H21NO3
![N-[4-(2,3-Dihydro-1,4-benzodioxin-6-ylmethoxy)benzyl]ethanamine chemical structure, C18H21NO3, CAS 938013-20-8](/s/BEISPIXDECVETD-UHFFFAOYSA-N.svg)
N-[4-(2,3-Dihydro-1,4-benzodioxin-6-ylmethoxy)benzyl]ethanamine
CAS 938013-20-8C18H21NO3
4,5,10,11-Tetrahydro-8,11-dimethoxy-2H-indolo(7a,1-a)isoquinolin-7-ol
CAS 26215-56-5C18H21NO3
Pseudocodeine
CAS 466-96-6C18H21NO3
4'-O-Methylcoclaurine
CAS 154727-04-5C18H21NO3
![N-[2-(4-Ethoxyphenoxy)ethyl]-3-methylbenzamide chemical structure, C18H21NO3, CAS 1171412-05-7](/s/MRERPKPKACOHGS-UHFFFAOYSA-N.svg)
N-[2-(4-Ethoxyphenoxy)ethyl]-3-methylbenzamide
CAS 1171412-05-7C18H21NO3
Metathebainon
CAS 510-66-7C18H21NO3
N-Adamantan-1-yl-phthalamic acid
CAS 26878-89-7C18H21NO3
6,7-Dimethoxy-1-(3-methoxyphenyl)-1,2,3,4-tetrahydroisoquinoline
CAS 188553-89-1C18H21NO3
2-(4-Ethoxyphenyl)-5,6-dimethyl-3a,4,7,7a-tetrahydro-1H-isoindole-1,3(2H)-dione
CAS 55680-91-6C18H21NO3
Ethyl 2-(((1R,2S)-2-hydroxy-1,2-diphenylethyl)amino)acetate
CAS 112835-62-8C18H21NO3
(1R)-1,2,3,4-Tetrahydro-1-((4-hydroxyphenyl)methyl)-7-methoxy-2-methyl-8-isoquinolinol
CAS 64091-05-0C18H21NO3
Ethanone, 1,1'-(1,4-dihydro-4-(4-methoxyphenyl)-2,6-dimethyl-3,5-pyridinediyl)bis-
CAS 86524-52-9C18H21NO3
3,4-Dimethoxy-N-(2-phenylpropyl)benzamide
CAS 6043-63-6C18H21NO3
- Methyl 4-(((2-methoxyphenethyl)amino)methyl)benzoate329774-40-5C18H21NO3
- 3-(Adamantane-1-carbonylamino)benzoic acid62144-91-6C18H21NO3
- 4-Isobutyramidonaphthalen-1-yl isobutyrate1624260-34-9C18H21NO3
- 2-(3,4-Dimethoxyphenyl)-N-(2-phenylethyl)acetamide3972-81-4C18H21NO3
- N-(2-Ethylphenyl)-2-(4-methoxyphenoxy)propanamide302806-58-2C18H21NO3
- 1-(2-Hydroxy-4-(2-methylpropoxy)phenyl)-3-(2-pyridinyl)-1-propanone1190230-47-7C18H21NO3
- 6-Methoxy-2-(4-methoxybenzyl)-1,2,3,4-tetrahydroisoquinolin-7-ol5056-80-4C18H21NO3
- Ethyl 3,5-dimethyl-4-(1-oxo-3-phenylpropyl)-1H-pyrrole-2-carboxylate311766-23-1C18H21NO3
- 2-(3,4-Dimethoxyphenyl)-N-(3,5-dimethylphenyl)acetamide5730-45-0C18H21NO3
- 4-(3-Methoxyphenyl)-7,7-dimethyl-3,4,6,8-tetrahydro-1H-quinoline-2,5-dione847466-87-9C18H21NO3
- N-[2-(3-Ethyl-5-methylphenoxy)ethyl]-2-hydroxybenzamide893778-77-3C18H21NO3
- Methyl N,N-dibenzyl-D-serinate202478-34-0C18H21NO3
- N-Cbz4-(4-hydroxyphenyl)butylamine587880-25-9C18H21NO3
- 3-(2'-Ethyl-4'-methoxy(1,1'-biphenyl)-4-yl)-L-alanine872142-86-4C18H21NO3
- {2,4-Dihydroxy-3-[(pentan-3-yl)amino]phenyl}(phenyl)methanone253681-42-4C18H21NO3
- Valerophenone, 5-(4-amino-2-methoxyphenoxy)-15382-92-0C18H21NO3
- N-(2,4-Dimethoxyphenyl)-2-phenylbutanamide349417-47-6C18H21NO3
- WB 40932170-50-5C18H21NO3
- 2-(3,4-Dimethoxyphenyl)-N-(3,4-dimethylphenyl)acetamide328262-79-9C18H21NO3
- N-(3,5-Dimethylphenyl)-2-(4-ethoxyphenoxy)acetamide686282-77-9C18H21NO3
- Butyl 4-(3-formyl-2,5-dimethyl-1H-pyrrol-1-yl)benzoate347332-06-3C18H21NO3
- 2-(3,4-Dimethoxyphenyl)-N-(1-phenylethyl)acetamide349395-67-1C18H21NO3
- 2H-1,3-Benzoxazine, 3,4-dihydro-8-methoxy-3-(2-(4-methoxyphenyl)ethyl)-55311-40-5C18H21NO3
- 6-(2,3,4,5-Tetrahydro-1-benzazepine-1-carbonyl)cyclohex-3-ene-1-carboxylic acid893777-06-5C18H21NO3
- 3-Hydroxy-4-(pyrrolidin-1-ylmethyl)-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one581785-45-7C18H21NO3
- Morphinan-8-ol, 6,7-didehydro-4,5-epoxy-3-methoxy-17-methyl-, (5alpha,8alpha)-509-55-7C18H21NO3
- 8,14beta-Dihydrooripavine873087-79-7C18H21NO3
- 3,4-Dimethoxy-N-[2-(propan-2-yl)phenyl]benzamide346692-47-5C18H21NO3
- N-(2-Methoxyphenyl)-2-[4-(propan-2-yl)phenoxy]acetamide303991-23-3C18H21NO3
- 4-(3-(Dimethylamino)propoxy)-2-hydroxybenzophenone83803-90-1C18H21NO3
- 2-Ethoxy-N-(tetrahydro-2-furanylmethyl)-1-naphthamide903089-27-0C18H21NO3
- (5S)-5-[3-(4-Methoxyphenyl)-5-methyl-4,5-dihydro-1,2-oxazol-5-yl]-2-methylcyclohex-2-en-1-one1013764-35-6C18H21NO3
- Morphinan-6-ol, 7,8-didehydro-4,5-epoxy-3-(methoxy-d3)-17-(methyl-d3)-, (5a,6a)-C18H21NO3
- Orthobenzoic acid, p-cyano-, cyclic ester with 2-cyclohexyl-2-(hydroxymethyl)-1,3-propanediol97720-15-5C18H21NO3
- Ethyl 5-acetyl-2,6-dimethyl-4-phenyl-1,4-dihydropyridine-3-carboxylate20970-69-8C18H21NO3
- N-Ethyl-2,6-dimethoxy-N-(2-methylphenyl)benzamide13493-27-1C18H21NO3
- 3,5-Dimethoxy-N-(2-propan-2-ylphenyl)benzamide349108-30-1C18H21NO3
- 3,4-Dimethoxy-N-(1-phenylpropan-2-yl)benzamide351988-57-3C18H21NO3
- N-[2-(4-Methoxyphenyl)ethyl]-2-phenoxypropanamide349579-79-9C18H21NO3
- N-[(2-Methoxyphenyl)methyl]-2-phenoxybutanamide86455-29-0C18H21NO3
- 6-(1,2,3,4-Tetrahydronaphthalen-1-ylcarbamoyl)cyclohex-3-ene-1-carboxylic acid1023578-24-6C18H21NO3
- 4-{5-[(Cyclohexylamino)methyl]furan-2-yl}benzoic acid932954-21-7C18H21NO3
- N-(3-Isopropoxyphenyl)-2-phenoxypropanamide909521-37-5C18H21NO3
- 3-{5-[(Cyclohexylamino)methyl]-2-furyl}benzoic acid932160-03-7C18H21NO3
- Ethyl 1,4 dimethyl-5-(rho-toluoyl)-pyrrole-2-acetate33369-35-6C18H21NO3
- N-Depropylpropafenone, (S)-138584-26-6C18H21NO3
- Benzene, 1-ethoxy-4-(1-(4-methylphenyl)-2-nitropropyl)-54010-81-0C18H21NO3
- 2-(Dimethylamino)-1-(4-methoxyphenyl)ethyl benzoate67032-36-4C18H21NO3
- N-[2-(4-Methoxy-3-phenylmethoxyphenyl)ethyl]acetamide55161-43-8C18H21NO3
- 2,4-Dimethoxy-N-(4-propan-2-ylphenyl)benzamide331435-61-1C18H21NO3
- N-(2-Methoxyphenyl)-2-(2,4,6-trimethylphenoxy)acetamide431893-43-5C18H21NO3
- N-(3-Methoxyphenyl)-2-[4-(propan-2-yl)phenoxy]acetamide431999-54-1C18H21NO3
- 2-(3,4-Dimethylphenoxy)-N-(2-methoxybenzyl)acetamide432526-26-6C18H21NO3
- 2-(2,6-Dimethylphenoxy)-N-(4-ethoxyphenyl)acetamide445426-85-7C18H21NO3
- 2-(Mesityloxy)-N-(4-methoxyphenyl)acetamide339059-68-6C18H21NO3
- N-(2-Butoxyphenyl)-2-methoxybenzamide449166-94-3C18H21NO3
- 4-(4-Methoxyphenoxy)-N-(2-methylphenyl)butanamide433965-63-0C18H21NO3
- 9-(3-Hydroxypropyl)-2,3,6,7-tetrahydro-1H-pyrano[2,3-f]pyrido[3,2,1-ij]quinolin-11(5H)-one203115-66-6C18H21NO3
- N-(3-Butoxyphenyl)-2-methoxybenzamide313267-61-7C18H21NO3
- 2-(3,4-Dimethylphenoxy)-N-(2-ethoxyphenyl)acetamide303991-26-6C18H21NO3
- N-(2-Ethoxyphenyl)-2-(2-methylphenoxy)propanamide723259-64-1C18H21NO3
- Ethyl 3-amino-3-[4-(benzyloxy)phenyl]propanoate755749-52-1C18H21NO3
- 4-(2-Phenoxyethoxy)-N-propan-2-ylbenzamide881562-23-8C18H21NO3
- 2-(2-Phenoxyethoxy)-N-propan-2-ylbenzamide881578-44-5C18H21NO3
- 3-(2-Phenoxyethoxy)-N-propan-2-ylbenzamide881589-58-8C18H21NO3
- 6-(5,6,7,8-Tetrahydronaphthalen-2-ylcarbamoyl)cyclohex-3-ene-1-carboxylic acid893775-95-6C18H21NO3
- Morphinan-3-ol, 7,8-didehydro-4,5-alpha-epoxy-6-beta-methoxy-17-methyl-63732-59-2C18H21NO3
- Morphinan-3-ol, 6,7-didehydro-4,5-alpha-epoxy-8-alpha-methoxy-17-methyl-63813-36-5C18H21NO3
- 6-(Indolinylcarbonyl)-3,4-dimethylcyclohex-3-enecarboxylic acid904759-69-9C18H21NO3
- H-Thr(Bzl)-OBzl42001-91-2C18H21NO3
- Ethyl 2-(((1S,2R)-2-hydroxy-1,2-diphenylethyl)amino)acetate100678-82-8C18H21NO3
- 4-Ethoxy-N-(4-isopropoxyphenyl)benzamide882617-47-2C18H21NO3
- 3-Ethoxy-N-(4-isopropoxyphenyl)benzamide882587-88-4C18H21NO3
- N-(3-Ethoxyphenyl)-3-isopropoxybenzamide909361-97-3C18H21NO3
- N-(2-Isopropoxyphenyl)-2-(2-methylphenoxy)acetamide908554-69-8C18H21NO3
- 4-Ethoxy-N-(2-isopropoxyphenyl)benzamide909375-26-4C18H21NO3
Frequently asked questions
What is the molar mass of C18H21NO3?
The molar mass of C18H21NO3 is 299.37 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 3 oxygen atoms. The monoisotopic mass is 305.1898 Da.
How many compounds have the formula C18H21NO3?
CompoundList lists 637 compounds with the molecular formula C18H21NO3, including 2-(2,4-Dimethylphenoxy)-N-(2-methoxy-5-methylphenyl)acetamide, 4-Butoxy-N-(2-methoxyphenyl)benzamide, 3-[(2-Phenylethyl)carbamoyl]bicyclo[2.2.2]oct-5-ene-2-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 C18H21NO3?
C18H21NO3 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.