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 301 to 400 of 637 compounds
![Methyl 6-cinnamoyl-6-azaspiro[2.5]octane-1-carboxylate chemical structure, C18H21NO3, CAS 2035004-96-5](/s/JTCWWLNBMQTPFQ-BQYQJAHWSA-N.svg)
Methyl 6-cinnamoyl-6-azaspiro[2.5]octane-1-carboxylate
CAS 2035004-96-5C18H21NO3
Ethyl 6-(cyclopentylmethylene)-5,6,7,8-tetrahydro-5-oxo-2-quinolinecarboxylate
CAS 2482794-50-1C18H21NO3
5H-Cyclopenta(b)pyridin-5-one, 1,2,3,4,6,7-hexahydro-6-methylene-1-(4-(4-methyl-5-oxo-2(5H)-furanylidene)butyl)-, (Z)-
CAS 152606-65-0C18H21NO3
Mandelic acid, (2-(dimethylamino)-1-phenyl)ethyl ester
CAS 67465-38-7C18H21NO3
Spiro(isoquinoline-4(1H),4'-(4H)pyran)-1,3(2H)-dione, 2',3',5',6'-tetrahydro-2-allyl-2',6'-dimethyl-
CAS 13699-43-9C18H21NO3
Benzyl N-(1-hydroxy-3-phenylpropan-2-yl)-N-methylcarbamate
CAS 301833-79-4C18H21NO3
![(4-tert-Butylphenyl)methyl N-[(E)-2-(furan-2-yl)ethenyl]carbamate chemical structure, C18H21NO3, CAS 338399-84-1](/s/GMMMQQMYNVMBDZ-ZHACJKMWSA-N.svg)
(4-tert-Butylphenyl)methyl N-[(E)-2-(furan-2-yl)ethenyl]carbamate
CAS 338399-84-1C18H21NO3
2-(2,3-Dimethylphenoxy)-N-(2-methoxyphenyl)propanamide
CAS 692272-12-1C18H21NO3
N-Ethyl-2-(2-methoxyphenoxy)-N-(3-methylphenyl)acetamide
CAS 881596-27-6C18H21NO3
2-Pyrrolidinone, 1-(2-(2-hydroxy-2-(1-naphthalenyl)ethoxy)ethyl)-
CAS 131963-57-0C18H21NO3
![N-[4-(2-Phenoxyethoxy)phenyl]butanamide chemical structure, C18H21NO3, CAS 881770-84-9](/s/QSTWFPIXCNLZTN-UHFFFAOYSA-N.svg)
N-[4-(2-Phenoxyethoxy)phenyl]butanamide
CAS 881770-84-9C18H21NO3
delta-6 Codeine
CAS 6252-51-3C18H21NO3
![(16E)-16-Hydroxyimino-13-methyl-9,11,12,14,15,17-hexahydro-6H-cyclopenta[a]phenanthrene-3,17-diol chemical structure, C18H21NO3, CAS 5173-43-3](/s/FYVXSFWTEDENGI-KNTRCKAVSA-N.svg)
(16E)-16-Hydroxyimino-13-methyl-9,11,12,14,15,17-hexahydro-6H-cyclopenta[a]phenanthrene-3,17-diol
CAS 5173-43-3C18H21NO3
![2-(2-Methoxyphenyl)-N-[1-(4-methoxyphenyl)ethyl]acetamide chemical structure, C18H21NO3, CAS 898158-33-3](/s/CZXKQSQSGOHZIH-UHFFFAOYSA-N.svg)
2-(2-Methoxyphenyl)-N-[1-(4-methoxyphenyl)ethyl]acetamide
CAS 898158-33-3C18H21NO3
![N-[(3,4-Dimethoxyphenyl)methyl]-2-(4-methylphenyl)acetamide chemical structure, C18H21NO3, CAS 898159-19-8](/s/IMYGFIFETUTWAQ-UHFFFAOYSA-N.svg)
N-[(3,4-Dimethoxyphenyl)methyl]-2-(4-methylphenyl)acetamide
CAS 898159-19-8C18H21NO3
![N-[(3,4-Dimethoxyphenyl)methyl]-2-(3-methylphenyl)acetamide chemical structure, C18H21NO3, CAS 898139-65-6](/s/NYCCPGWYNSXROK-UHFFFAOYSA-N.svg)
N-[(3,4-Dimethoxyphenyl)methyl]-2-(3-methylphenyl)acetamide
CAS 898139-65-6C18H21NO3
![2H-Indol-2-one, 1-[2-(3,4-dimethoxyphenyl)ethyl]-1,4,5,6-tetrahydro- chemical structure, C18H21NO3, CAS 94997-16-7](/s/FWXDSYMMUWWBGO-UHFFFAOYSA-N.svg)
2H-Indol-2-one, 1-[2-(3,4-dimethoxyphenyl)ethyl]-1,4,5,6-tetrahydro-
CAS 94997-16-7C18H21NO3
(2R,3S)-Methyl 2-hydroxy-3-phenyl-3-(((S)-1-phenylethyl)amino)propanoate
CAS 147058-27-3C18H21NO3
N-(2-Hydroxy-2-(3-(phenylmethoxy)phenyl)propyl)acetamide
CAS 115852-01-2C18H21NO3
2-(4-Methylphenoxy)-N-(3-propoxyphenyl)acetamide
CAS 899517-40-9C18H21NO3
2-(4-Methoxyphenyl)-N-(3-propoxyphenyl)acetamide
CAS 899517-50-1C18H21NO3
2-(3,5-Dimethylphenoxy)-N-(3-ethoxyphenyl)acetamide
CAS 899531-69-2C18H21NO3
N-(3-Ethoxyphenyl)-2-(4-ethylphenoxy)acetamide
CAS 899514-17-1C18H21NO3
![N-[3-(2-Phenoxyethoxy)phenyl]butanamide chemical structure, C18H21NO3, CAS 903438-36-8](/s/GFDPELPQCKLCNE-UHFFFAOYSA-N.svg)
N-[3-(2-Phenoxyethoxy)phenyl]butanamide
CAS 903438-36-8C18H21NO3
- N-[4-(2-Ethoxyethoxy)phenyl]-2-phenylacetamide914452-86-1C18H21NO3
- N-[2-(2-Phenoxyethoxy)phenyl]butanamide914453-10-4C18H21NO3
- N-[2-(2-Ethoxyethoxy)phenyl]-2-phenylacetamide909362-71-6C18H21NO3
- N-[3-(2-Methoxyethoxy)phenyl]-3-phenylpropanamide925619-54-1C18H21NO3
- N-[1-(4-Methoxyphenoxy)propan-2-yl]-2-methylbenzamide932216-10-9C18H21NO3
- 6-(2-Amino-4,5-dimethoxyphenyl)-5,6,7,8-tetrahydronaphthalen-2-ol722520-70-9C18H21NO3
- 2-Methoxy-6-[2-(1,2,5-trimethyl-1H-pyrrol-3-yl)-vinyl]-benzoic acid methyl ester365542-55-8C18H21NO3
- 4-(2-Methoxyethoxy)-N-(4-methylbenzyl)benzamide1158611-85-8C18H21NO3
- 5-(3-BOC-Aminophenyl)-2-methylphenol1261960-81-9C18H21NO3
- tert-Butyl 3-(4-amino-2-methylphenoxy)benzoate799242-33-4C18H21NO3
- tert-Butyl 4-(4-amino-2-methylphenoxy)benzoate799242-35-6C18H21NO3
- N-(2-Hydroxy-3-methoxy-2-methylpropyl)-[1,1'-biphenyl]-4-carboxamide1334372-12-1C18H21NO3
- 2-tert-Butyl-4-(3-methoxycarbonylphenyl)-5-aminophenol873055-75-5C18H21NO3
- tert-Butyl N-{[3-(3-hydroxyphenyl)phenyl]methyl}carbamate862541-16-0C18H21NO3
- 3-tert-Butyl-2-methoxy-5-(2-methoxy-3-pyridyl)benzaldehyde1206776-46-6C18H21NO3
- 2-Ethoxy-6-(2,4,6-trimethylphenylamino)-benzoic acid1085386-15-7C18H21NO3
- Benzyl [2-(4-hydroxy-phenyl)-1,1-dimethyl-ethyl]-carbamate868049-78-9C18H21NO3
- N-(3-Hydroxy-3-phenylpropyl)-2-(o-tolyloxy)acetamide1396876-15-5C18H21NO3
- N-(3-Cyclopropyl-3-hydroxypropyl)-2-(naphthalen-2-yloxy)acetamide1396853-74-9C18H21NO3
- (E)-3-(Furan-3-yl)-N-(2-methoxy-2-phenylbutyl)acrylamide1798431-85-2C18H21NO3
- (4-Prop-2-enoxyphenyl) 1-prop-2-ynylpiperidine-4-carboxylate1436076-53-7C18H21NO3
- N-(Furan-2-ylmethyl)-3-methyl-N-(tetrahydro-2H-pyran-4-yl)benzamide1798521-84-2C18H21NO3
- (E)-3-(Furan-3-yl)-N-(2-hydroxy-2-methyl-4-phenylbutyl)acrylamide1799264-49-5C18H21NO3
- 1-(3-Phenylprop-2-enoyl)-octahydro-1H-indole-2-carboxylic acid1798900-60-3C18H21NO3
- N-(Isochroman-3-ylmethyl)-N,2,5-trimethylfuran-3-carboxamide2034320-24-4C18H21NO3
- N-[1-[3-(Benzyloxy)-4-methoxyphenyl]-2-propyl]formamide1802408-42-9C18H21NO3
- Ethyl 2-oxo-1-phenyl-1,3,4,5,6,7-hexahydroquinoline-4A(2H)-carboxylate2096985-74-7C18H21NO3
- Phenyl 5-tert-butyl-2-methoxyphenylcarbamate1630204-95-3C18H21NO3
- 2-(4-Phenylbutyl)hexahydro-1H-4,7-epoxyisoindole-1,3(2H)-dione19819-60-4C18H21NO3
- 2-(2-Phenylbutyl)hexahydro-1H-4,7-epoxyisoindole-1,3(2H)-dione19819-64-8C18H21NO3
- N-[4-(4-Phenoxybutoxy)phenyl]acetamide35965-99-2C18H21NO3
- 2-(6-Methoxy-4-methylquinolin-2-yl)cyclohexane-1-carboxylic acid7468-49-7C18H21NO3
- N-(2-Ethoxyphenyl)-2-(3-ethylphenoxy)acetamide634161-63-0C18H21NO3
- 2-(2,4-Dimethylphenoxy)-N-(2-ethoxyphenyl)acetamide438478-72-9C18H21NO3
- 2-(2,3-Dimethylphenoxy)-N-(2-hydroxy-3,5-dimethylphenyl)acetamide445412-56-6C18H21NO3
- 2-(4-Propylphenoxy)ethyl N-phenylcarbamate84320-81-0C18H21NO3
- 3-(1,1-Dimethylethyl)-5-[(1-naphthalenyloxy)methyl]-2-oxazolidinone74660-00-7C18H21NO3
- 3-Ethoxy-N-[1-(4-methoxyphenyl)ethyl]benzamide831237-35-5C18H21NO3
- Methyl 5-formyl-4-(4-isopropylphenyl)-1,2-dimethyl-1H-pyrrole-3-carboxylate881041-59-4C18H21NO3
- 3,5-Dimethoxy-4-methyl-N-(1-phenylethyl)benzamide793693-22-8C18H21NO3
- N-(2,4-Dimethoxyphenyl)-2-methyl-2-phenylpropanamide91401-49-9C18H21NO3
- Cyclopentanone, 2-[(2-ethoxy-1H-indol-3-yl)carbonyl]-4,4-dimethyl-61579-90-6C18H21NO3
- (S)-Methyl 2-(benzylamino)-3-(benzyloxy)propanoateC18H21NO3
- N-Benzyl-2-(2-methoxyphenoxy)butanamide86463-98-1C18H21NO3
- N-(2,3-Dimethylphenyl)-2-(2-methoxyethoxy)benzamide882097-99-6C18H21NO3
- N-(3,4-Dimethylphenyl)-2-(2-methoxyethoxy)benzamide882093-16-5C18H21NO3
- N-(2,5-Dimethylphenyl)-2-(2-methoxyethoxy)benzamide882094-94-2C18H21NO3
- N-(3,4-Dimethylphenyl)-4-(2-methoxyethoxy)benzamide882083-49-0C18H21NO3
- N-(2,6-Dimethylphenyl)-4-(2-methoxyethoxy)benzamide882088-77-9C18H21NO3
- N-(3,5-Dimethylphenyl)-4-(2-methoxyethoxy)benzamide882084-71-1C18H21NO3
- N-(2,5-Dimethylphenyl)-4-(2-methoxyethoxy)benzamide882084-76-6C18H21NO3
- N-(2,3-Dimethylphenyl)-4-(2-methoxyethoxy)benzamide882087-68-5C18H21NO3
- N-(2,4-Dimethylphenyl)-4-(2-methoxyethoxy)benzamide882083-59-2C18H21NO3
- N-(2,4-Dimethoxyphenyl)-3-(4-methylphenyl)propanamide930761-62-9C18H21NO3
- 2-(3,4-Dimethylphenoxy)-N-(3-methoxyphenyl)propanamide899290-71-2C18H21NO3
- tert-Butyl ((4-hydroxyphenyl)(phenyl)methyl)carbamate79876-22-5C18H21NO3
- Ethyl 2-[2-cyano-1-(3-methoxyphenyl)cyclohex-2-en-1-yl]acetate51993-77-2C18H21NO3
- Ethanone, 1-[4-(diethylamino)phenyl]-2-hydroxy-2-(2-hydroxyphenyl)-76530-22-8C18H21NO3
- 6-Cyclooctyl-4-hydroxyquinoline-3-carboxylic acid55377-01-0C18H21NO3
- Ethyl 8-cyclohexyl-4-oxo-1,4-dihydroquinoline-3-carboxylate55376-64-2C18H21NO3
- Benzyl 4-(2-amino-2-methylpropoxy)benzoate357186-00-6C18H21NO3
- 6,7-Dimethoxy-1-phenoxymethyl-1,2,3,4-tetrahydro-isoquinoline3341-32-0C18H21NO3
- Methyl 4-[[[2-(4-methoxyphenyl)ethyl]amino]methyl]benzoate1019558-22-5C18H21NO3
- (2,5-Dimethylfuran-3-yl)(3-(4-methoxyphenyl)pyrrolidin-1-yl)methanone1209804-44-3C18H21NO3
- N-[2-Hydroxy-2-(2-methoxyphenyl)ethyl]-3,5-dimethylbenzamide1211735-07-7C18H21NO3
- N-(2-Methoxy-5-methylphenyl)-2-(propan-2-yloxy)benzamide1269383-08-5C18H21NO3
- 4-(4-BOC-Aminophenyl)-2-methylphenol1261893-59-7C18H21NO3
- 5-Hexyl-2-(2-phenylethenyl)-1,3-oxazole-4-carboxylic acid89724-24-3C18H21NO3
- 2-[2-(6,7-Dihydro-3-methoxy-8(5H)-isoquinolinylidene)ethyl]-2-methyl-1,3-cyclopentanedione56053-60-2C18H21NO3
- 4-Ethoxy-N-(2-hydroxy-3-phenylpropyl)benzamide1351632-23-9C18H21NO3
- 3-(Tetrahydro-2H-pyran-4-yl)-2,3,4,9-tetrahydro-1H-carbazole-6-carboxylic acid1121526-80-4C18H21NO3
- (5-Cyclopropyl-6-methoxypyridin-2-yl)(4-ethoxyphenyl)methanol1310948-25-4C18H21NO3
- 2-[4-(5-Methoxypyridin-3-yl)phenyl]-2,3-dimethylbutanoic acid1382486-28-3C18H21NO3
- N,N-Dibenzyl-O-methyl-D-serine1207608-63-6C18H21NO3
- tert-Butyl ((3-hydroxyphenyl)(phenyl)methyl)carbamate1416069-62-9C18H21NO3
- N-[2-Cyclopropyl-2-(furan-2-yl)-2-hydroxyethyl]-3-phenylpropanamide1396806-77-1C18H21NO3
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 Methyl 6-cinnamoyl-6-azaspiro[2.5]octane-1-carboxylate, Ethyl 6-(cyclopentylmethylene)-5,6,7,8-tetrahydro-5-oxo-2-quinolinecarboxylate, 5H-Cyclopenta(b)pyridin-5-one, 1,2,3,4,6,7-hexahydro-6-methylene-1-(4-(4-methyl-5-oxo-2(5H)-furanylidene)butyl)-, (Z)-. 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.