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 401 to 500 of 637 compounds
![N-[2-Cyclopropyl-2-(furan-2-yl)-2-hydroxyethyl]-2,5-dimethylbenzamide chemical structure, C18H21NO3, CAS 1396783-15-5](/s/LBSYZONBDBEEAB-UHFFFAOYSA-N.svg)
N-[2-Cyclopropyl-2-(furan-2-yl)-2-hydroxyethyl]-2,5-dimethylbenzamide
CAS 1396783-15-5C18H21NO3
2-Ethoxy-N-(3-hydroxy-3-phenylpropyl)benzamide
CAS 1396746-97-6C18H21NO3
4-Ethoxy-N-(3-hydroxy-3-phenylpropyl)benzamide
CAS 1396876-24-6C18H21NO3
N-(2-Cyclopropyl-2-hydroxy-2-phenylethyl)-2,5-dimethylfuran-3-carboxamide
CAS 1421465-67-9C18H21NO3
N-(2-(Furan-3-yl)ethyl)-4-phenyltetrahydro-2H-pyran-4-carboxamide
CAS 1448035-58-2C18H21NO3
3-Methoxy-N-(2-methoxy-2-(o-tolyl)ethyl)benzamide
CAS 1797892-40-0C18H21NO3
![N-[2-Methoxy-2-(3-methoxyphenyl)ethyl]-2-methylbenzamide chemical structure, C18H21NO3, CAS 1797722-84-9](/s/IKWODVQASYCHMO-UHFFFAOYSA-N.svg)
N-[2-Methoxy-2-(3-methoxyphenyl)ethyl]-2-methylbenzamide
CAS 1797722-84-9C18H21NO3
![N-[2-Methoxy-2-(2-methoxyphenyl)ethyl]-2-methylbenzamide chemical structure, C18H21NO3, CAS 1795455-14-9](/s/MLWZHUZWSBEFDC-UHFFFAOYSA-N.svg)
N-[2-Methoxy-2-(2-methoxyphenyl)ethyl]-2-methylbenzamide
CAS 1795455-14-9C18H21NO3
N-(2-(Benzofuran-2-yl)-2-hydroxypropyl)cyclohex-3-enecarboxamide
CAS 2034277-30-8C18H21NO3
Benzyl (1-hydroxy-4-phenylbutan-2-yl)carbamate
CAS 1403991-14-9C18H21NO3
N-(1-(2,3-Dihydrobenzofuran-5-yl)propan-2-yl)-2,5-dimethylfuran-3-carboxamide
CAS 2034349-42-1C18H21NO3
N-(2-(Benzofuran-2-yl)-2-methoxyethyl)cyclohex-3-enecarboxamide
CAS 2034292-24-3C18H21NO3
4-Isobutoxybenzylamine N-phenyl formate
CAS 1817844-09-9C18H21NO3
![N-{2-[4-(Furan-2-yl)phenyl]-2-hydroxyethyl}cyclopentanecarboxamide chemical structure, C18H21NO3, CAS 2097903-31-4](/s/SVNJTRASCZITMM-UHFFFAOYSA-N.svg)
N-{2-[4-(Furan-2-yl)phenyl]-2-hydroxyethyl}cyclopentanecarboxamide
CAS 2097903-31-4C18H21NO3
![(S)-Ethyl 3-amino-3-(4'-methoxy-[1,1'-biphenyl]-3-yl)propanoate chemical structure, C18H21NO3, CAS 2248089-76-9](/s/GXHYIVFHOWWONC-KRWDZBQOSA-N.svg)
(S)-Ethyl 3-amino-3-(4'-methoxy-[1,1'-biphenyl]-3-yl)propanoate
CAS 2248089-76-9C18H21NO3
![(S)-Ethyl 3-amino-3-(3'-methoxy-[1,1'-biphenyl]-3-yl)propanoate chemical structure, C18H21NO3, CAS 2248089-80-5](/s/AMDPMOLHWOLRRV-KRWDZBQOSA-N.svg)
(S)-Ethyl 3-amino-3-(3'-methoxy-[1,1'-biphenyl]-3-yl)propanoate
CAS 2248089-80-5C18H21NO3
N-(1,3-Benzodioxol-5-ylmethyl)-N-(1-methylcyclopentyl)but-2-ynamide
CAS 2411254-85-6C18H21NO3
2,5-Cyclohexadien-1-one, 4-((2,6-diethylphenyl)imino)-2,6-dimethoxy-
CAS 83560-95-6C18H21NO3
(3-Phenoxyphenyl)methyl N-tert-butylcarbamate
CAS 98991-87-8C18H21NO3
Phenethyl 2-amino-3-(4-methoxyphenyl)propanoate
CAS 6330-22-9C18H21NO3
1-(2,5-Dimethoxyphenyl)-6-methoxy-1,2,3,4-tetrahydroisoquinoline
CAS 596790-94-2C18H21NO3
2,3,4,9-Tetrahydro-2-(isopropoxymethylene)-6-methoxy-4-methyl-1H-carbazol-1-one
CAS 72237-74-2C18H21NO3
Benzene, 1-methoxy-4-(1-(4-methylphenyl)-2-nitrobutyl)-
CAS 53982-27-7C18H21NO3
2,4-Diethoxy-N-(2-methylphenyl)benzamide
CAS 898136-72-6C18H21NO3
- N-(2,4-Dimethoxyphenyl)-2-(3,4-dimethylphenyl)acetamide903313-61-1C18H21NO3
- Acetamide, N-[2-(2-methoxyphenoxy)ethyl]-N-(2-methylphenyl)-61293-88-7C18H21NO3
- Acetamide, N-[2-(2-methoxyphenoxy)ethyl]-N-(3-methylphenyl)-61293-89-8C18H21NO3
- Acetamide, N-[2-(2-methoxyphenoxy)ethyl]-N-(4-methylphenyl)-61293-90-1C18H21NO3
- Methyl N-benzyl-O-methyltyrosinate61780-19-6C18H21NO3
- Benzamide, 2-(2-hydroxyethyl)-N-[2-(3-methoxyphenyl)ethyl]-62310-88-7C18H21NO3
- Benzamide, 2-(2-hydroxyethyl)-N-[2-(4-methoxyphenyl)ethyl]-62310-89-8C18H21NO3
- Benzyl N-benzyl-N-(3-hydroxypropyl)carbamate86953-66-4C18H21NO3
- Benzyl N-(4-hydroxy-1-phenylbutyl)carbamate2680799-59-9C18H21NO3
- 7,8-Dimethoxy-1-phenoxy-2,3,4,5-tetrahydro-1H-3-benzazepine89739-67-3C18H21NO3
- N-(3,5-Dimethylphenyl)-2-(2-methoxyethoxy)benzamide882094-88-4C18H21NO3
- N-(3-Methoxypropyl)-4-(phenylmethoxy)benzamide909374-60-3C18H21NO3
- Benzyl N-(2-hydroxy-4-phenylbutyl)carbamate2275308-40-0C18H21NO3
- 6-Cyclohexyl-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid55376-45-9C18H21NO3
- 7-Cyclohexyl-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid55376-50-6C18H21NO3
- 6-Cycloheptyl-1-methyl-4-oxo-1,4-dihydroquinoline-3-carboxylic acid55376-97-1C18H21NO3
- Benzyl N-(4-hydroxy-1-phenylbutan-2-yl)carbamate1035812-69-1C18H21NO3
- 3-Methoxy-N-[(4-methoxyphenyl)methyl]-N,4-dimethylbenzamide1010040-48-8C18H21NO3
- 2-[(Benzyl-methyl-amino)-methyl]-6-methoxy-benzoic acid methyl ester1171923-14-0C18H21NO3
- Methyl 4-(hydroxymethyl)-2-methyl-5-(1-naphthyl)-pyrrolidine-2-carboxylate1217606-36-4C18H21NO3
- 3-Methoxy-N-[1-(2-methylphenoxy)propan-2-yl]benzamide1269021-66-0C18H21NO3
- 5-(3-BOC-Aminophenyl)-3-methylphenol1261963-27-2C18H21NO3
- Ethyl (2S)-2-amino-3-[4-(benzyloxy)phenyl]propanoate19842-36-5C18H21NO3
- N-(2',3'-Dimethoxy[1,1'-biphenyl]-4-yl)-2-methylpropanamide1309205-84-2C18H21NO3
- 2-Methyl-6-oxo-1-phenyl-4-propyl-1,6-dihydro-pyridine-3-carboxylic acid ethyl ester1310923-56-8C18H21NO3
- 2-[2-[4-(1,1-Dimethylethyl)phenyl]ethoxy]-4-pyridinecarboxylic acid1008774-81-9C18H21NO3
- Methyl 3-cyclohexyl-2-formyl-1-methyl-1H-indole-6-carboxylate494799-43-8C18H21NO3
- 1-[4-[(2-Aminophenyl)methoxy]-2-hydroxy-3-propylphenyl]ethanone888968-60-3C18H21NO3
- Phenyl 3-acetyl-4-(tert-butyl)pyridine-1(4H)-carboxylate503857-01-0C18H21NO3
- tert-Butyl 2-(5-benzyloxy-pyridin-2-yl)acetate947688-59-7C18H21NO3
- N-(3-Hydroxy-3-phenylpropyl)-2-(4-methoxyphenyl)acetamide1354498-07-9C18H21NO3
- (4S,7aR,12bS)-3-Methyl-9-(trideuteriomethoxy)-1,2,4,4a,5,6,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinolin-7-one1007854-30-9C18H21NO3
- 2,5-Dimethoxy-N-[3-(2-methoxyphenyl)prop-2-en-1-yl]aniline416862-43-6C18H21NO3
- (3-Formyl-1H-indol-1-yl)methyl 2-cyclohexylacetate912355-30-7C18H21NO3
- tert-Butyl N-[(1S)-1-(naphthalen-2-yl)-3-oxopropyl]carbamate1027769-23-8C18H21NO3
- (2R,3R)-2,3-Dihydroxy-N-methyl-3-phenyl-N-(2-phenylethyl)propanamide140848-73-3C18H21NO3
- 1-(5-(4-Isobutylphenyl)isoxazol-3-yl)cyclobutanecarboxylic acid1352529-84-0C18H21NO3
- 1-(5-(4-Isopropylphenyl)isoxazol-3-yl)cyclopentanecarboxylic acid1352505-27-1C18H21NO3
- 4-(Benzyloxy)-3-isobutoxybenzamide1574285-46-3C18H21NO3
- tert-Butyl 2-(3,6-dihydro-2H-pyran-4-yl)-1H-indole-1-carboxylate1847463-04-0C18H21NO3
- tert-Butyl 2-methyl-7-oxo-6,7,8,9-tetrahydropyrido[1,2-a]indole-6-carboxylate1403367-59-8C18H21NO3
- Methyl 2-(but-2-ynamido)-3-(1,2,3,4-tetrahydronaphthalen-1-yl)propanoate2094064-81-8C18H21NO3
- Ethyl 6-(4-(tert-butyl)phenoxy)nicotinate2133382-71-3C18H21NO3
- Methyl 3-(dibenzylamino)-2-hydroxypropanoate1881534-33-3C18H21NO3
- 3-(2-(4-(Benzyloxy)phenoxy)ethoxy)azetidine2241314-06-5C18H21NO3
- Methyl 2-((2-amino-3-phenylpropoxy)methyl)benzoate2089649-98-7C18H21NO3
- tert-Butyl 2-(3-(benzyloxy)pyridin-2-yl)acetate2378270-82-5C18H21NO3
- tert-Butyl (diphenylmethoxy)carbamate154083-76-8C18H21NO3
- 3-(Benzyloxy)-4-((tetrahydro-2H-pyran-4-yl)oxy)aniline2749755-46-0C18H21NO3
- Ethyl 6-(4-butylphenoxy)-3-pyridinecarboxylate503617-61-6C18H21NO3
- Benzyl N-(3-hydroxy-3-phenylpropyl)-N-methylcarbamate2680695-29-6C18H21NO3
- (S)-Ethyl 2-amino-3-(3'-methoxy-[1,1'-biphenyl]-3-yl)propanoate2748426-30-2C18H21NO3
- (S)-Ethyl 2-amino-3-(4'-methoxy-[1,1'-biphenyl]-3-yl)propanoate2748478-83-1C18H21NO3
- (R)-Ethyl 2-amino-3-(3'-methoxy-[1,1'-biphenyl]-3-yl)propanoate2748426-61-9C18H21NO3
- (R)-Ethyl 2-amino-3-(4'-methoxy-[1,1'-biphenyl]-3-yl)propanoate2749443-94-3C18H21NO3
- (R)-Ethyl 2-amino-3-(2'-methoxy-[1,1'-biphenyl]-3-yl)propanoate2748553-70-8C18H21NO3
- (S)-Ethyl 3-amino-3-(3'-methoxy-[1,1'-biphenyl]-4-yl)propanoate2748476-50-6C18H21NO3
- (S)-Ethyl 3-amino-3-(4'-methoxy-[1,1'-biphenyl]-4-yl)propanoate2748476-78-8C18H21NO3
- 2-(Benzyloxy)-4-((tetrahydro-2H-pyran-4-yl)oxy)aniline2819318-18-6C18H21NO3
- tert-Butyl (2-(quinolin-2-ylmethyl)allyl) carbonate2380341-15-9C18H21NO3
- 1H-4,10b-Propanobenz[h]isoquinoline-3,13(2H)-dione, 4,4a,5,6-tetrahydro-7-methoxy-4-methyl-3134-42-7C18H21NO3
- tert-Butyl N-(3-hydroxybiphenyl-4-ylmethyl)carbamate880156-96-7C18H21NO3
- 3-Ethoxy-4-methoxy-N-(1-phenylethyl)benzamide838881-25-7C18H21NO3
- (14alpha)-7,8-Didehydro-4,5alpha-epoxy-3-methoxy-17-methylmorphinan-6alpha-ol16206-70-5C18H21NO3
- Methyl 1-[(2-Hydroxy-1-naphthyl)methyl]-4-piperidinecarboxylate3026713-50-5C18H21NO3
- Butanal, O-(2-(4-phenoxyphenoxy)ethyl)oxime88354-80-7C18H21NO3
- 2-Methyl-N-(2-(4-phenoxyphenoxy)ethoxy)propan-1-imine88354-81-8C18H21NO3
- N-(2-(4-Phenoxyphenoxy)ethoxy)butan-2-imine88354-83-0C18H21NO3
- 4-(2-Ethyl-4-methoxyphenyl)-DL-phenylalanine1338371-98-4C18H21NO3
- Benzyl 3-[(benzyloxy)amino]butanoate88517-47-9C18H21NO3
- 5-Hexyl-2-styryloxazole-4-carboxylic acidC18H21NO3
- tert-Butyl 2-amino-5-(phenoxymethyl)benzoate88072-00-8C18H21NO3
- 2-(Cyclohexylidenemethyl)-5-methoxy-1-methyl-1H-indole-3-carboxylic acid122946-86-5C18H21NO3
- Benzyl N-(3-hydroxy-4-phenylbutan-2-yl)carbamate2155598-34-6C18H21NO3
- Benzyl N-[1-(4-hydroxyphenyl)butan-2-yl]carbamate114963-15-4C18H21NO3
- 4-[4-(4-Methoxyphenoxy)piperidin-1-yl]phenol681509-03-5C18H21NO3
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-[2-Cyclopropyl-2-(furan-2-yl)-2-hydroxyethyl]-2,5-dimethylbenzamide, 2-Ethoxy-N-(3-hydroxy-3-phenylpropyl)benzamide, 4-Ethoxy-N-(3-hydroxy-3-phenylpropyl)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.