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
Compounds with the formula C18H21NO3
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 601 to 637 of 637 compounds
![Benzyl N-(2-hydroxyethyl)-N-[(1R)-1-phenylethyl]carbamate chemical structure, C18H21NO3, CAS 2679919-86-7](/s/NONXCZQSVCSJEV-OAHLLOKOSA-N.svg)
![Benzyl N-{2-ethynyl-7-oxaspiro[3.5]nonan-2-yl}carbamate chemical structure, C18H21NO3, CAS 2680723-27-5](/s/NIQUGXARBJPINH-UHFFFAOYSA-N.svg)
![Benzyl N-ethyl-N-[1-(3-hydroxyphenyl)ethyl]carbamate chemical structure, C18H21NO3, CAS 1871324-96-7](/s/LKPAGYJAPAXTKX-UHFFFAOYSA-N.svg)
![Benzyl N-[4-(4-hydroxyphenyl)butan-2-yl]carbamate chemical structure, C18H21NO3, CAS 1204483-98-6](/s/XBPIFUQWJKYKBP-UHFFFAOYSA-N.svg)
![Benzyl N-(2-hydroxyethyl)-N-[(1S)-1-phenylethyl]carbamate chemical structure, C18H21NO3, CAS 2679805-39-9](/s/NONXCZQSVCSJEV-HNNXBMFYSA-N.svg)
![Ethyl (2R)-2-amino-3-[4-(benzyloxy)phenyl]propanoate chemical structure, C18H21NO3, CAS 1998644-71-5](/s/SCRGJBNYIHLGLM-QGZVFWFLSA-N.svg)
![Benzyl N-[4-(1-hydroxy-2-methylpropan-2-yl)phenyl]carbamate chemical structure, C18H21NO3, CAS 2763977-20-2](/s/RNNOLLWRGHIBNT-UHFFFAOYSA-N.svg)
![Benzyl N-[3-(1-hydroxy-2-methylpropan-2-yl)phenyl]carbamate chemical structure, C18H21NO3, CAS 2763930-97-6](/s/ZRFDPWATZPIPTR-UHFFFAOYSA-N.svg)
![Benzyl N-[2-hydroxy-2-(3-methylphenyl)ethyl]-N-methylcarbamate chemical structure, C18H21NO3, CAS 2763931-95-7](/s/SUNULEMJPFSCTC-UHFFFAOYSA-N.svg)
![tert-Butyl 3'-amino-5-methoxy-[1,1'-biphenyl]-3-carboxylate chemical structure, C18H21NO3, CAS 3078387-43-3](/s/WXEHNMMBNONQEP-UHFFFAOYSA-N.svg)
![tert-Butyl 2'-amino-5-methoxy-[1,1'-biphenyl]-3-carboxylate chemical structure, C18H21NO3, CAS 3078388-98-1](/s/YWIOBVGIDGMMIS-UHFFFAOYSA-N.svg)
![tert-Butyl 4'-amino-5-methoxy-[1,1'-biphenyl]-3-carboxylate chemical structure, C18H21NO3, CAS 3078405-43-0](/s/XWJUWKPAKOQWHZ-UHFFFAOYSA-N.svg)
![2-(Methoxymethyl)-6-[4-[(tetrahydro-2H-pyran-2-yl)oxy]phenyl]pyridine chemical structure, C18H21NO3, CAS 1401819-40-6](/s/RDXIKWNZWHAOKM-UHFFFAOYSA-N.svg)
- (E)-N-[2-(4-Phenoxyphenoxy)propoxy]propan-1-imine88355-06-0C18H21NO3
- Propanal, O-(3-(4-phenoxyphenoxy)propyl)oxime88355-74-2C18H21NO3
- (±)-N-Methyldesethylreboxetine847996-52-5C18H21NO3
- N-Benzyloxycarbonyl (+)-anatoxin A120692-41-3C18H21NO3
- Benzyl N-(1-hydroxy-4-phenylbutyl)carbamate197173-25-4C18H21NO3
- O-Trideuteromethyl codeine1007844-41-8C18H21NO3
- tert-Butyl 3-hydroxy-3-(naphthalen-2-yl)azetidine-1-carboxylate1694032-60-4C18H21NO3
- Methyl 8-isobutyl-5,6-dihydro-4H-benzo[3,4]cyclohepta[1,2-d]isoxazole-3-carboxylate2089326-50-9C18H21NO3
- (1S,4R)-4,7,7-Trimethyl-3-oxo-N-(4-vinylphenyl)-2-oxabicyclo[2.2.1]heptane-1-carboxamide2719733-60-3C18H21NO3
- N-(3-(1,4-Dioxo-1,4-dihydronaphthalen-2-yl)propyl)pivalamide2363073-11-2C18H21NO3
- 1-(4-Hydroxyphenyl)-2-[4-(2,3,5,6-tetradeuterio-4-hydroxyphenyl)butan-2-ylamino]ethanone1650594-30-1C18H21NO3
- tert-Butyl 2-(6-(benzyloxy)pyridin-2-yl)acetate3078338-68-5C18H21NO3
- Methyl 3-(4-cyclohexylphenyl)-5-methyl-1,2-oxazole-4-carboxylate55278-57-4C18H21NO3
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 Benzyl N-(2-hydroxyethyl)-N-[(1R)-1-phenylethyl]carbamate, Benzyl N-(3-hydroxyphenyl)-N-(2-methylpropyl)carbamate, Benzyl N-{2-ethynyl-7-oxaspiro[3.5]nonan-2-yl}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 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.