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 201 to 300 of 637 compounds
N-(3-Isopropoxyphenyl)-2-(3-methylphenoxy)acetamide
CAS 909519-23-9C18H21NO3
N-(3-Isopropoxyphenyl)-2-(4-methoxyphenyl)acetamide
CAS 909519-35-3C18H21NO3
4-Ethoxy-N-(3-isopropoxyphenyl)benzamide
CAS 909521-51-3C18H21NO3
(4-((Benzyloxy)methyl)piperidin-1-yl)(furan-2-yl)methanone
CAS 1226433-02-8C18H21NO3
6-Methoxy-2-(4-pentoxybenzoyl)pyridine
CAS 1187171-44-3C18H21NO3
4-(3-BOC-Aminophenyl)-2-methylphenol
CAS 1262000-60-1C18H21NO3
5-(4-BOC-Aminophenyl)-2-methylphenol
CAS 1261960-84-2C18H21NO3
5-(4-Boc-aminophenyl)-3-methylphenol
CAS 1261890-14-5C18H21NO3
N-(Furan-2-ylmethyl)-2-phenyl-N-(tetrahydro-2H-pyran-4-yl)acetamide
CAS 1448044-50-5C18H21NO3
N-Cbz-2-(4-methoxyphenyl)isopropylamine
CAS 1403483-88-4C18H21NO3
![N-[2-(2,5-Dimethoxyphenyl)ethyl]-1-(2-methoxyphenyl)methanimine chemical structure, C18H21NO3, CAS 1566571-78-5](/s/QPVMUPLRZMIWJW-UHFFFAOYSA-N.svg)
N-[2-(2,5-Dimethoxyphenyl)ethyl]-1-(2-methoxyphenyl)methanimine
CAS 1566571-78-5C18H21NO3
p-Cymene-2-carboxylic acid, 3-methoxy-, p-aminophenyl ester
CAS 1715-75-9C18H21NO3
p-Cymene-2-carboxanilide, 4'-hydroxy-3-methoxy-
CAS 3894-03-9C18H21NO3
Benzoic acid, 2-((2,3-dimethylphenyl)amino)-, ethoxymethyl ester
CAS 29098-16-6C18H21NO3
o-Toluic acid, alpha-(2-(dimethylamino)ethoxy)-alpha-phenyl-
CAS 29214-99-1C18H21NO3
1-Hydroxypentan-2-yl N-(4-phenylphenyl)carbamate
CAS 6624-96-0C18H21NO3
![5-{[(1-Ethynylcyclohexyl)oxy]methyl}-3-phenyl-1,3-oxazolidin-2-one chemical structure, C18H21NO3, CAS 42468-57-5](/s/RUJQPJUEWBJKJR-UHFFFAOYSA-N.svg)
5-{[(1-Ethynylcyclohexyl)oxy]methyl}-3-phenyl-1,3-oxazolidin-2-one
CAS 42468-57-5C18H21NO3
7,8-Dimethoxy-3-methyl-1-phenyl-4,5-dihydro-1H-2,3-benzoxazepine
CAS 74675-33-5C18H21NO3
2-(4-Ethylphenoxy)-N-(2-hydroxy-4,5-dimethylphenyl)acetamide
CAS 425662-91-5C18H21NO3
3,5-Dimethoxy-N-(4-propan-2-ylphenyl)benzamide
CAS 331435-64-4C18H21NO3
2-(2,6-Dimethylphenoxy)-N-(2-ethoxyphenyl)acetamide
CAS 431053-82-6C18H21NO3
N-Mesityl-2-(4-methoxyphenoxy)acetamide
CAS 299954-04-4C18H21NO3
2-(3,4-Dimethylphenoxy)-N-(2-methoxy-5-methylphenyl)acetamide
CAS 432527-70-3C18H21NO3
N-(4-Ethoxyphenyl)-2-(4-ethylphenoxy)acetamide
CAS 352689-63-5C18H21NO3
- 2-[Benzyl(methyl)amino]ethyl 3-methoxybenzoate431913-00-7C18H21NO3
- 11,12-Dihydroglaziovine54274-43-0C18H21NO3
- Formamide, N-(2-(3,4-dimethoxyphenyl)-1-(4-methylphenyl)ethyl)-65884-32-4C18H21NO3
- Picolinic acid, 5-butoxy-, p-ethylphenyl ester74416-85-6C18H21NO3
- Ethyl 3-amino-3-[3-(benzyloxy)phenyl]propanoate502841-86-3C18H21NO3
- N-(4-Methoxyphenyl)-2-(2-methylpropoxy)benzamide881247-23-0C18H21NO3
- tert-Butyl N-[4-(benzyloxy)phenyl]carbamate852668-28-1C18H21NO3
- 1-(3,4-Dimethoxyphenyl)-2,6-dimethyl-6,7-dihydro-5H-indol-4-one1024367-53-0C18H21NO3
- 6-Methyleneoxymorphone63251-69-4C18H21NO3
- 3-[(2-Methyl-2,3-dihydro-1H-indol-1-yl)carbonyl]bicyclo[2.2.1]heptane-2-carboxylic acid1005153-41-2C18H21NO3
- Morpholine, 2-((4-methoxyphenoxy)phenylmethyl)-93851-91-3C18H21NO3
- Ethyl 6-cyclohexyl-4-hydroxyquinoline-3-carboxylate55376-43-7C18H21NO3
- 4-(2-Methoxyethoxy)-N-(1-phenylethyl)benzamide882085-97-4C18H21NO3
- N-(2-Isobutoxyphenyl)-4-methoxybenzamide887029-25-6C18H21NO3
- N-[4-(1,3-Benzodioxol-5-ylmethoxy)benzyl]-N-propylamine938007-90-0C18H21NO3
- Ethyl 7-cyclohexyl-4-hydroxyquinoline-3-carboxylate55376-47-1C18H21NO3
- N-Depropylpropafenone, (R)-138584-25-5C18H21NO3
- 2-Methoxy-N-methyl-6-(2-methyl-benzyloxymethyl)-benzamide1171923-43-5C18H21NO3
- tert-Butyl N-{[4-(4-hydroxyphenyl)phenyl]methyl}carbamate848853-15-6C18H21NO3
- Pioglitazone impurity 351207681-52-4C18H21NO3
- 2-[1-(2-Methylfuran-3-carbonyl)pyrrolidin-2-yl]-1-phenylethan-1-ol1384582-34-6C18H21NO3
- (S)-tert-Butyl((3-hydroxyphenyl)(phenyl)methyl)carbamate1416070-90-0C18H21NO3
- (3-(Benzo[d][1,3]dioxol-5-yl)pyrrolidin-1-yl)(cyclohex-3-en-1-yl)methanone2034273-04-4C18H21NO3
- tert-Butyl 3-hydroxy-3-(naphthalen-1-yl)azetidine-1-carboxylate1696848-61-9C18H21NO3
- 2-(Dimethylamino)-1-phenylethyl 4-methoxybenzoate66827-75-6C18H21NO3
- Mandelic acid, alpha-(1-propynyl)-, 3-quinuclidinyl ester101711-19-7C18H21NO3
- 3-Hydroxy-2,2-diphenylpropyl hydrogen ethylcarbonimidate25384-57-0C18H21NO3
- 2-[Benzyl(methyl)amino]ethyl 4-methoxybenzoate430470-13-6C18H21NO3
- 2-(2,4-Dimethylphenoxy)-N-(2-hydroxy-4,5-dimethylphenyl)acetamide335209-98-8C18H21NO3
- 3,4-Diethoxy-N-(4-methylphenyl)benzamide349446-57-7C18H21NO3
- N-(4-Methoxybenzyl)-4-(propan-2-yloxy)benzamide618080-38-9C18H21NO3
- 2-(4-Methoxyphenoxy)-N-(3-phenylpropyl)acetamide429629-72-1C18H21NO3
- 2-Methoxy-N-[2-(2-methylphenoxy)ethyl]-2-phenylacetamide345988-51-4C18H21NO3
- N-[4-(2-Methylpropoxy)phenyl]-2-phenoxyacetamide881089-84-5C18H21NO3
- 2-Butoxy-N-(2-methoxyphenyl)benzamide881095-05-2C18H21NO3
- N-(2,4-Dimethylphenyl)-2-(2-methoxyphenoxy)propanamide815617-13-1C18H21NO3
- N-(2,3-Dimethylphenyl)-2-(2-methoxyphenoxy)propanamide815621-11-5C18H21NO3
- 4-(2-Phenoxyethoxy)-N-propylbenzamide881563-19-5C18H21NO3
- 3-(2-Phenoxyethoxy)-N-propylbenzamide96814-66-3C18H21NO3
- 3-Ethoxy-N-(4-propoxyphenyl)benzamide881755-70-0C18H21NO3
- N-Benzyl-3-(3,4-dimethoxyphenyl)propanamide40958-49-4C18H21NO3
- (14alpha)-7,8-Didehydro-4-hydroxy-3-methoxy-17-methylmorphinan-6-one596-59-8C18H21NO3
- Hasubanan-6-ol, 7,8-didehydro-4,5-epoxy-3-methoxy-17-methyl-, (5alpha,6alpha,13beta,14beta)-738-91-0C18H21NO3
- Furo(3,2-c)quinoline, 6-methoxy-4-methyl-2-(1-(1-methylethoxy)ethyl)-89784-81-6C18H21NO3
- Furo(3,2-c)quinoline, 8-methoxy-4-methyl-2-(1-(1-methylethoxy)ethyl)-88654-63-1C18H21NO3
- 4-[(2-Dimethylaminoethoxy)phenylmethyl]benzoic acid210304-44-2C18H21NO3
- N-Ethyl-4-(2-methoxyethoxy)-N-phenylbenzamide882082-74-8C18H21NO3
- 4-(2-Methoxyethoxy)-N-(2-phenylethyl)benzamide882082-99-7C18H21NO3
- N-(3-Butoxyphenyl)-4-methoxybenzamide899547-36-5C18H21NO3
- 2-Phenoxy-N-(3-propoxyphenyl)propanamide899538-54-6C18H21NO3
- 4-(2-Ethoxyethoxy)-N-(3-methylphenyl)benzamide902384-40-1C18H21NO3
- 4-(2-Ethoxyethoxy)-N-(4-methylphenyl)benzamide902385-30-2C18H21NO3
- N-Benzyl-4-(2-ethoxyethoxy)benzamide902385-38-0C18H21NO3
- 2-(2-Ethoxyethoxy)-N-(3-methylphenyl)benzamide903482-42-8C18H21NO3
- 2-(2-Ethoxyethoxy)-N-(4-methylphenyl)benzamide903450-22-6C18H21NO3
- N-[4-(2-Ethoxyethoxy)phenyl]-2-methylbenzamide914453-68-2C18H21NO3
- N-[4-(2-Ethoxyethoxy)phenyl]-3-methylbenzamide914453-23-9C18H21NO3
- N-[4-(2-Ethoxyethoxy)phenyl]-4-methylbenzamide914452-90-7C18H21NO3
- N-(2-Methoxybenzyl)-2-(4-methylphenoxy)propanamide902821-49-2C18H21NO3
- 4-(3,3-Dimethyl-2-methylenebicyclo[2.2.1]heptane-1-carboxamido)benzoic acid889307-52-2C18H21NO3
- Morpholin-4-yl(5-phenyl-2-propylfuran-3-yl)methanone954800-56-7C18H21NO3
- Mandestrobin 2-demethyl173662-85-6C18H21NO3
- 8-Oxa-2-azaspiro(4.5)decane-1,3-dione, 2-allyl-7-methyl-9-phenyl-94997-26-9C18H21NO3
- 7-Methyl-4-(2-(3-methylpiperidin-1-yl)-2-oxoethyl)-2H-chromen-2-one919757-63-4C18H21NO3
- 2-Ethoxy-N-((1-(hydroxymethyl)cyclopropyl)methyl)-1-naphthamide1257553-53-9C18H21NO3
- 1-(4-Hydroxyphenyl)-2-[(1-phenoxypropan-2-yl)amino]propan-1-one60640-80-4C18H21NO3
- N-[(4-Hydroxyoxan-4-yl)methyl]-2-(naphthalen-1-yl)acetamide1351615-84-3C18H21NO3
- N-(2-Hydroxy-2-phenylpropyl)-2-(o-tolyloxy)acetamide1351644-10-4C18H21NO3
- Benzyl [1-(3-methoxyphenyl)-1-methylethyl]carbamate706792-50-9C18H21NO3
- Codeine-d6C18H21NO3
- N-[(2-Hydroxy-1,2,3,4-tetrahydronaphthalen-2-yl)methyl]-2,5-dimethylfuran-3-carboxamide1421509-27-4C18H21NO3
- N-(3-(Benzofuran-2-yl)-3-hydroxypropyl)cyclohex-3-enecarboxamide1448054-71-4C18H21NO3
- N-(3-(2,5-Dimethylfuran-3-yl)-3-hydroxypropyl)cinnamamide1421587-24-7C18H21NO3
- tert-Butyl N-[1-(naphthalen-2-yl)-1-oxopropan-2-yl]carbamate2013356-81-3C18H21NO3
- 2-Oxo-1-phenethyl-1,3,4,5,6,7-hexahydro-4a(2H)-quinolinecarboxylic acid1400635-44-0C18H21NO3
- Ethyl (E)-6-(Cyclopentylmethylene)-5-oxo-5,6,7,8-tetrahydroquinoline-2-carboxylate1616071-23-8C18H21NO3
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 N-(3-Isopropoxyphenyl)-2-(3-methylphenoxy)acetamide, N-(3-Isopropoxyphenyl)-2-(4-methoxyphenyl)acetamide, 4-Ethoxy-N-(3-isopropoxyphenyl)benzamide. 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.