Molecular formula
C18H21NO4
415 compounds have this formula on CompoundList.
- Molar mass
- 315.37g/mol
- Monoisotopic mass
- 321.1847Da
- Atoms
- 44
- Elements
- 4
- Rings plus double bonds
- 9
The formula C18H21NO4 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 4 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 × 1868.55%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.71%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.44%14.007 × 1 = 14.007 g/mol
- O Oxygen × 420.29%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C18H21NO4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 301 to 400 of 415 compounds
(3,4-Diethoxyphenyl)carbamic acid benzyl ester
CAS 95261-65-7C18H21NO4
![2-[(1-Methylethyl)amino]-2-oxoethyl 6-methoxy-2-naphthaleneacetate chemical structure, C18H21NO4, CAS 162584-49-8](/s/YHRCIJJXOTUIJD-UHFFFAOYSA-N.svg)
2-[(1-Methylethyl)amino]-2-oxoethyl 6-methoxy-2-naphthaleneacetate
CAS 162584-49-8C18H21NO4
![tert-Butyl N-[4-(3-hydroxy-5-methoxyphenyl)phenyl]carbamate chemical structure, C18H21NO4, CAS 1261923-86-7](/s/SGKPGTUDMNHSSY-UHFFFAOYSA-N.svg)
tert-Butyl N-[4-(3-hydroxy-5-methoxyphenyl)phenyl]carbamate
CAS 1261923-86-7C18H21NO4
tert-Butyl 4-(benzyloxy)-2-hydroxyphenylcarbamate
CAS 957207-76-0C18H21NO4
4-Methyl-2-(2-oxo-4-(o-tolyloxy)pyridin-1(2H)-yl)pentanoic acid
CAS 1262239-16-6C18H21NO4
![Benzyl N-[3-(benzyloxy)-2-hydroxypropyl]carbamate chemical structure, C18H21NO4, CAS 137618-54-3](/s/YVFCNSISPDBRQY-UHFFFAOYSA-N.svg)
Benzyl N-[3-(benzyloxy)-2-hydroxypropyl]carbamate
CAS 137618-54-3C18H21NO4
![4-[(2Z)-3-Phenylprop-2-enoyl]-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid chemical structure, C18H21NO4, CAS 1327167-96-3](/s/DZGNTGMBHAPDHX-KTKRTIGZSA-N.svg)
4-[(2Z)-3-Phenylprop-2-enoyl]-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid
CAS 1327167-96-3C18H21NO4
8-Phenanthridinol,5,6-dihydro-5,6-dimethyl-,ethyl carbonate
CAS 855352-79-3C18H21NO4
N-(2,4-Dimethoxy-6-methylphenyl)-N-(2-methoxyphenyl)acetamide
CAS 109246-56-2C18H21NO4
methanone chemical structure, C18H21NO4, CAS 1226048-18-5](/s/CUWRFEYEIATFIP-UHFFFAOYSA-N.svg)
[4-(3-Aminopropoxy)phenyl](3,4-dimethoxyphenyl)methanone
CAS 1226048-18-5C18H21NO4
![6-Benzyl 2-tert-butyl (1R,5R,6R)-2-azabicyclo[3.1.0]hex-3-ene-2,6-dicarboxylate chemical structure, C18H21NO4, CAS 366018-12-4](/s/IYNOFCHQQSIMLU-RBSFLKMASA-N.svg)
6-Benzyl 2-tert-butyl (1R,5R,6R)-2-azabicyclo[3.1.0]hex-3-ene-2,6-dicarboxylate
CAS 366018-12-4C18H21NO4
![Phenol, 2-[[[2-(3,4-dimethoxyphenyl)ethyl]imino]methyl]-6-methoxy- chemical structure, C18H21NO4, CAS 88307-67-9](/s/CJQCATYNXFXZEG-UHFFFAOYSA-N.svg)
Phenol, 2-[[[2-(3,4-dimethoxyphenyl)ethyl]imino]methyl]-6-methoxy-
CAS 88307-67-9C18H21NO4
![2-[(3-Oxo-5-phenyl-2-propanoylcyclohex-1-en-1-yl)amino]propanoic acid chemical structure, C18H21NO4, CAS 1030010-86-6](/s/ZEBVYDKKKBBWPG-OKXUNJKRSA-N.svg)
2-[(3-Oxo-5-phenyl-2-propanoylcyclohex-1-en-1-yl)amino]propanoic acid
CAS 1030010-86-6C18H21NO4
![1-{1-[(Benzyloxy)carbonyl]-1,2,3,6-tetrahydropyridin-4-yl}cyclobutane-1-carboxylic acid chemical structure, C18H21NO4, CAS 2287316-22-5](/s/ZDOPALMQYQVNJC-UHFFFAOYSA-N.svg)
1-{1-[(Benzyloxy)carbonyl]-1,2,3,6-tetrahydropyridin-4-yl}cyclobutane-1-carboxylic acid
CAS 2287316-22-5C18H21NO4
![tert-Butyl 5-hydroxy-1-(hydroxymethyl)-1,2-dihydro-3H-benzo[e]indole-3-carboxylate chemical structure, C18H21NO4, CAS 1262400-34-9](/s/AKDZSDFBRGLSAO-UHFFFAOYSA-N.svg)
tert-Butyl 5-hydroxy-1-(hydroxymethyl)-1,2-dihydro-3H-benzo[e]indole-3-carboxylate
CAS 1262400-34-9C18H21NO4
3-(3-Morpholinopropoxy)-2-naphthoic acid
CAS 1798783-56-8C18H21NO4
![Methyl 3-[Boc(methyl)amino]-2-naphthoate chemical structure, C18H21NO4, CAS 1631716-15-8](/s/KDUYNFBDOFOCDA-UHFFFAOYSA-N.svg)
Methyl 3-[Boc(methyl)amino]-2-naphthoate
CAS 1631716-15-8C18H21NO4
1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3,7-dimethyloct-6-enoate
CAS 2240185-71-9C18H21NO4
![2-Oxazolidinone, 5-[[(4-methoxy-1-naphthalenyl)oxy]methyl]-3-(1-methylethyl)-, (S)- chemical structure, C18H21NO4, CAS 160334-48-5](/s/DDEQSXXAFVXLEP-ZDUSSCGKSA-N.svg)
2-Oxazolidinone, 5-[[(4-methoxy-1-naphthalenyl)oxy]methyl]-3-(1-methylethyl)-, (S)-
CAS 160334-48-5C18H21NO4
![2-Piperidineacetic acid, 1-[2-(2-benzofuranyl)-1-oxopropyl]- chemical structure, C18H21NO4, CAS 1569740-04-0](/s/BFOXVPBNKRJCNK-UHFFFAOYSA-N.svg)
2-Piperidineacetic acid, 1-[2-(2-benzofuranyl)-1-oxopropyl]-
CAS 1569740-04-0C18H21NO4
1,3-Dioxoisoindolin-2-yl 4-cyclohexylbutanoate
CAS 2248403-33-8C18H21NO4
![Benzyl N-(2-hydroxyethyl)-N-[(4-methoxyphenyl)methyl]carbamate chemical structure, C18H21NO4, CAS 2680733-44-0](/s/NFRMQWWUZFKVDI-UHFFFAOYSA-N.svg)
Benzyl N-(2-hydroxyethyl)-N-[(4-methoxyphenyl)methyl]carbamate
CAS 2680733-44-0C18H21NO4
![Benzyl N-[(2S)-1-(benzyloxy)-3-hydroxypropan-2-yl]carbamate chemical structure, C18H21NO4, CAS 58578-42-0](/s/WNHWJDZKNFBZHP-KRWDZBQOSA-N.svg)
Benzyl N-[(2S)-1-(benzyloxy)-3-hydroxypropan-2-yl]carbamate
CAS 58578-42-0C18H21NO4
![N-[2-(2,4,5-Trimethoxyphenyl)ethyl]benzamide chemical structure, C18H21NO4, CAS 61177-93-3](/s/AFETVBOEJYTEEW-UHFFFAOYSA-N.svg)
N-[2-(2,4,5-Trimethoxyphenyl)ethyl]benzamide
CAS 61177-93-3C18H21NO4
- 3-Methyl 1-phenyl 6-butylpyridine-1,3(6H)-dicarboxylate89808-31-1C18H21NO4
- 3-Methyl 1-phenyl 4-butylpyridine-1,3(4H)-dicarboxylate89808-32-2C18H21NO4
- N-(3-Hydroxy-4-methoxyphenyl)-N-methyl-3-propoxybenzamide90234-50-7C18H21NO4
- Benzyl N-[(2R)-1-(benzyloxy)-3-hydroxypropan-2-yl]carbamate58577-90-5C18H21NO4
- (9alpha,13alpha,14alpha)-4-Hydroxy-3,7-dimethoxy-7,8-didehydromorphinan-6-oneC18H21NO4
- Cephalotaxine-13C,d31217734-28-5C18H21NO4
- 1-[(2Z)-2-(6,7-Dimethoxy-3,4-dihydro-2H-naphthalen-1-ylidene)acetyl]pyrrolidin-2-one40535-19-1C18H21NO4
- 2-(Ethyl(2-methylallyl)amino)-2-oxoethyl 2H-chromene-3-carboxylate1317046-27-7C18H21NO4
- N-(tert-Butoxycarbonyl)-N-(naphthalen-1-yl)-D-alanine2382178-71-2C18H21NO4
- Diethyl 2,2'-(1-phenyl-1H-pyrrole-2,5-diyl)diacetate67543-05-9C18H21NO4
- 2-(3,4-Diethoxyphenyl)-4,5,6,7-tetrahydro-1H-isoindole-1,3(2H)-dione61517-44-0C18H21NO4
- 1-Methyl-4-(1,5,8-trimethoxynaphthalen-2-yl)pyrrolidin-2-one919800-64-9C18H21NO4
- 3-tert-Butyl-4,5-dimethoxy-3'-nitro-1,1'-biphenyl923277-40-1C18H21NO4
- (R)-4-Benzyl-3-((1R,2R)-2-methyl-4-oxocyclohexane-1-carbonyl)oxazolidin-2-one2041844-84-0C18H21NO4
- N-[(4,4-Dimethyl-2,6-dioxocyclohexylidene)methyl]-L-phenylalanine150352-21-9C18H21NO4
- 6-(2-((tert-Butoxycarbonyl)amino)ethyl)-2-naphthoic acid1449228-08-3C18H21NO4
- N-(1,3-Benzodioxol-4-ylmethyl)-2-(2,5-dimethoxyphenyl)ethanamine2644654-23-7C18H21NO4
- 3-{1-[(Benzyloxy)carbonyl]pyrrolidin-3-yl}bicyclo[1.1.1]pentane-1-carboxylic acid2803828-35-3C18H21NO4
- tert-Butyl N-[1-(2-methoxynaphthalen-1-yl)-2-oxoethyl]carbamate2228955-70-0C18H21NO4
- tert-Butyl N-{1-[5-(4-methylphenyl)furan-2-yl]-2-oxoethyl}carbamate2229000-29-5C18H21NO4
- tert-Butyl N-{4-[4-(hydroxymethyl)phenoxy]phenyl}carbamate2408972-27-8C18H21NO4
- tert-Butyl N-[1-(6-methoxynaphthalen-2-yl)-2-oxoethyl]carbamate2229296-88-0C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-cyclohexyl-2-methylpropanoate2248374-34-5C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(3,4-dimethylcyclohexyl)acetate2248312-15-2C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-cyclohexyl-2-methylpropanoate2248310-32-7C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(2,2-dimethylcyclohexyl)acetate2248324-91-4C18H21NO4
- 3-({1-[(Benzyloxy)carbonyl]azetidin-3-yl}methyl)bicyclo[1.1.1]pentane-1-carboxylic acid2803829-43-6C18H21NO4
- tert-Butyl N-[2-(2-hydroxynaphthalen-1-yl)-1-oxopropan-2-yl]carbamate2228657-84-7C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-cycloheptylpropanoate2248350-13-0C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(4,4-dimethylcyclohexyl)acetate2248272-83-3C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(3,3-dimethylcyclohexyl)acetate2248309-46-6C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-cyclohexylbutanoate2248341-55-9C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1,4,4-trimethylcyclohexane-1-carboxylate2248285-36-9C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 1-(2-methylpropyl)cyclopentane-1-carboxylate2248344-77-4C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 3-tert-butyl-3-methylcyclobutane-1-carboxylate2248328-02-9C18H21NO4
- rac-(3aR,4S,9bS)-5-[(tert-butoxy)carbonyl]-3H,3aH,4H,5H,9bH-cyclopenta[c]quinoline-4-carboxylic acid2803419-23-8C18H21NO4
- Benzyl N-[2-(2,6-dimethoxyphenyl)ethyl]carbamate2803851-53-6C18H21NO4
- tert-Butyl N-[1-(4-methoxynaphthalen-1-yl)-2-oxoethyl]carbamate2229503-87-9C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl (1R,3S)-1,2,2,3-tetramethylcyclopentane-1-carboxylate2248185-74-0C18H21NO4
- rac-3-[(1R,3S)-3-({[(Benzyloxy)carbonyl]amino}methyl)cyclohexyl]prop-2-ynoic acid2580102-91-4C18H21NO4
- 1,3-Dioxo-2,3-dihydro-1H-isoindol-2-yl 2-(2-methylpropyl)hex-5-enoate2248411-89-2C18H21NO4
- (2S)-1-[(Benzyloxy)carbonyl]-4-{bicyclo[1.1.1]pentan-1-yl}pyrrolidine-2-carboxylic acid2580128-56-7C18H21NO4
- 5-{1-[(Benzyloxy)carbonyl]piperidin-2-yl}pent-2-ynoic acid2580215-18-3C18H21NO4
- 2-{[(Benzyloxy)carbonyl]amino}dispiro[3.0.3^{5}.1^{4}]nonane-9-carboxylic acid2580249-13-2C18H21NO4
- 5-({[(Benzyloxy)carbonyl]amino}methyl)tricyclo[3.3.0.0,3,7]octane-1-carboxylic acid2580180-53-4C18H21NO4
- (1R,2S,6R,7S)-4-[(Benzyloxy)carbonyl]-4-azatricyclo[5.3.0.0,2,6]decane-9-carboxylic acid2580099-96-1C18H21NO4
- Benzyl N-(2-hydroxyethyl)-N-[(2-methoxyphenyl)methyl]carbamate1871373-15-7C18H21NO4
- Benzyl N-[1-(4-ethoxyphenyl)-2-hydroxyethyl]carbamate2680881-14-3C18H21NO4
- Benzyl N-[1-(3-hydroxy-4-methoxyphenyl)propan-2-yl]carbamate2680664-95-1C18H21NO4
- Benzyl N-[2-(4-hydroxy-3-methoxyphenyl)ethyl]-N-methylcarbamate2680721-77-9C18H21NO4
- 1-Benzyl 3-ethyl 3-(prop-2-yn-1-yl)pyrrolidine-1,3-dicarboxylate2680847-78-1C18H21NO4
- 1-Benzyl 2-methyl 2-(prop-2-yn-1-yl)piperidine-1,2-dicarboxylate2680781-25-1C18H21NO4
- 1-Benzyl 3-methyl 3-(prop-2-yn-1-yl)piperidine-1,3-dicarboxylate2680767-70-6C18H21NO4
- Benzyl N-(1-hydroxy-2-methyl-3-phenoxypropan-2-yl)carbamate2680813-25-4C18H21NO4
- Benzyl N-benzyl-N-(2,3-dihydroxypropyl)carbamate2680839-83-0C18H21NO4
- Benzyl N-[2-hydroxy-2-(4-hydroxy-3-methylphenyl)ethyl]-N-methylcarbamate2680815-17-0C18H21NO4
- Benzyl N-{[5-(hydroxymethyl)furan-2-yl]methyl}-N-(2-methylprop-2-en-1-yl)carbamate2680739-68-6C18H21NO4
- Benzyl N-[1-hydroxy-1-(4-methoxyphenyl)propan-2-yl]carbamate2273703-02-7C18H21NO4
- Benzyl N-[4-(2-hydroxy-2-methylpropoxy)phenyl]carbamate2680852-05-3C18H21NO4
- Benzyl N-[2-hydroxy-3-(3-methylphenoxy)propyl]carbamate2680843-19-8C18H21NO4
- Benzyl 5,11-dihydroxy-7-azatetracyclo[6.2.1.0^{2,6}.0^{4,10}]undecane-7-carboxylate2680675-25-4C18H21NO4
- Benzyl N-(1,4-dihydroxy-4-phenylbutan-2-yl)carbamate2680824-10-4C18H21NO4
- Benzyl N-{4-hydroxy-3-[(propan-2-yloxy)methyl]phenyl}carbamate2680751-37-3C18H21NO4
- 1-Benzyl 4-methyl 4-(prop-2-yn-1-yl)piperidine-1,4-dicarboxylate2680663-55-0C18H21NO4
- Benzyl N-[2-hydroxy-1-(4-methoxyphenyl)propyl]carbamate2680872-62-0C18H21NO4
- Benzyl N-[2-hydroxy-2-(4-methoxyphenyl)propyl]carbamate2680700-16-5C18H21NO4
- Benzyl N-[1-(2-hydroxy-5-methoxyphenyl)propan-2-yl]carbamate2680795-99-5C18H21NO4
- Benzyl N-(1-hydroxy-3-methoxy-2-phenylpropan-2-yl)carbamate2680804-08-2C18H21NO4
- tert-Butyl N-[4-(5-ethylfuran-2-carbonyl)phenyl]carbamate2680681-84-7C18H21NO4
- Benzyl N-[3-hydroxy-2-(4-methoxyphenyl)propyl]carbamate2680755-59-1C18H21NO4
- Benzyl N-ethyl-N-[2-hydroxy-2-(3-hydroxyphenyl)ethyl]carbamate2680690-98-4C18H21NO4
- Benzyl N-{2-[4-(2-hydroxyethoxy)phenyl]ethyl}carbamate2680900-56-3C18H21NO4
- Benzyl N-[2-(2-hydroxy-4-methoxyphenyl)propan-2-yl]carbamate2680675-19-6C18H21NO4
- Benzyl 2-[2-(furan-2-yl)-2-hydroxyethyl]pyrrolidine-1-carboxylate2680623-28-1C18H21NO4
- Benzyl N-[2-hydroxy-1-(4-methoxyphenyl)ethyl]-N-methylcarbamate2680838-37-1C18H21NO4
- Benzyl N-[3-hydroxy-1-(4-methoxyphenyl)propyl]carbamate101719-25-9C18H21NO4
Frequently asked questions
What is the molar mass of C18H21NO4?
The molar mass of C18H21NO4 is 315.37 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 4 oxygen atoms. The monoisotopic mass is 321.1847 Da.
How many compounds have the formula C18H21NO4?
CompoundList lists 415 compounds with the molecular formula C18H21NO4, including (3,4-Diethoxyphenyl)carbamic acid benzyl ester, 2-[(1-Methylethyl)amino]-2-oxoethyl 6-methoxy-2-naphthaleneacetate, tert-Butyl N-[4-(3-hydroxy-5-methoxyphenyl)phenyl]carbamate. 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 C18H21NO4?
C18H21NO4 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.