Molecular formula
C18H21NO5
190 compounds have this formula on CompoundList.
- Molar mass
- 331.37g/mol
- Monoisotopic mass
- 331.1420Da
- Atoms
- 45
- Elements
- 4
- Rings plus double bonds
- 9
The formula C18H21NO5 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 5 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 × 1865.24%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.39%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 14.23%14.007 × 1 = 14.007 g/mol
- O Oxygen × 524.14%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C18H21NO5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 190 compounds
Tazettine
CAS 507-79-9C18H21NO5
Protokylol
CAS 136-70-9C18H21NO5
Pretazettine
CAS 17322-84-8C18H21NO5
Dimethyl 4-(3-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate
CAS 43114-34-7C18H21NO5
Dimethyl 4-(2-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate
CAS 73257-43-9C18H21NO5
Drupacine
CAS 49686-57-9C18H21NO5
![6-{[(1,3-Benzodioxol-5-ylmethyl)amino]carbonyl}-3,4-dimethyl-3-cyclohexene-1-carboxylic acid chemical structure, C18H21NO5, CAS 492437-40-8](/s/VJGWBNMMVPDGAM-UHFFFAOYSA-N.svg)
6-{[(1,3-Benzodioxol-5-ylmethyl)amino]carbonyl}-3,4-dimethyl-3-cyclohexene-1-carboxylic acid
CAS 492437-40-8C18H21NO5
![2-[(4-Ethoxycarbonylphenyl)carbamoyl]bicyclo[2.2.1]heptane-3-carboxylic acid chemical structure, C18H21NO5, CAS 353524-10-4](/s/AZXGDECSBDFRMU-UHFFFAOYSA-N.svg)
2-[(4-Ethoxycarbonylphenyl)carbamoyl]bicyclo[2.2.1]heptane-3-carboxylic acid
CAS 353524-10-4C18H21NO5
2-Methoxyethyl 5-((cyclopropanecarbonyl)oxy)-1,2-dimethyl-1H-indole-3-carboxylate
CAS 896850-53-6C18H21NO5
3,4,5-Trimethoxy-N-(2-phenoxyethyl)benzamide
CAS 297137-78-1C18H21NO5
3,4,5-Trimethoxy-N-(4-methoxybenzyl)benzamide
CAS 346704-37-8C18H21NO5
Undulatin
CAS 6882-09-3C18H21NO5
(3alpha,11S)-1,2-Didehydro-3,7-dimethoxycrinan-11-ol
C18H21NO5
Oxycodone N-oxide
CAS 71539-52-1C18H21NO5
![N-(1,3-Benzodioxol-5-ylmethyl)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxamide chemical structure, C18H21NO5, CAS 618400-55-8](/s/HSASNHNRNGFZFM-UHFFFAOYSA-N.svg)
N-(1,3-Benzodioxol-5-ylmethyl)-4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]heptane-1-carboxamide
CAS 618400-55-8C18H21NO5
1-(1,3-Benzodioxol-5-yl)-N-(2,4,5-trimethoxybenzyl)methanamine
CAS 418780-29-7C18H21NO5
N-(2-Ethoxyphenyl)-3,4,5-trimethoxybenzamide
CAS 3940-79-2C18H21NO5
3,4,8-Trimethyl-7-(2-morpholin-4-yl-2-oxoethoxy)chromen-2-one
CAS 500204-32-0C18H21NO5
![2H-Chromene-3-carboxylic acid 1-[(tetrahydro-furan-2-ylmethyl)-carbamoyl]-ethyl ester chemical structure, C18H21NO5, CAS 841282-20-0](/s/IBNQLIDJXYPBCV-UHFFFAOYSA-N.svg)
2H-Chromene-3-carboxylic acid 1-[(tetrahydro-furan-2-ylmethyl)-carbamoyl]-ethyl ester
CAS 841282-20-0C18H21NO5
![4,4-Dimethyl-3-(3-nitrophenyl)-2-oxaspiro[5.5]undecane-1,5-dione chemical structure, C18H21NO5, CAS 375834-84-7](/s/PMHVYPKNSLANMB-UHFFFAOYSA-N.svg)
4,4-Dimethyl-3-(3-nitrophenyl)-2-oxaspiro[5.5]undecane-1,5-dione
CAS 375834-84-7C18H21NO5
![Methyl 2-{[(4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]hept-1-yl)carbonyl]amino}benzoate chemical structure, C18H21NO5, CAS 613658-84-7](/s/SABJUOIESWNOCW-UHFFFAOYSA-N.svg)
Methyl 2-{[(4,7,7-trimethyl-3-oxo-2-oxabicyclo[2.2.1]hept-1-yl)carbonyl]amino}benzoate
CAS 613658-84-7C18H21NO5
Ambelline
CAS 3660-62-6C18H21NO5
Dimethyl 4-(4-methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate
CAS 73257-47-3C18H21NO5
N-(4-Hydroxy-2,6-dimethylphenyl)-3,4,5-trimethoxybenzamide
CAS 321688-23-7C18H21NO5
- N-(2,5-Dimethoxyphenyl)-2-(3,4-dimethoxyphenyl)acetamide349407-98-3C18H21NO5
- 4-(1,4-Dioxa-8-azaspiro[4.5]decan-8-ylmethyl)-7-hydroxy-8-methylchromen-2-one887209-73-6C18H21NO5
- Berkeleyamide D1019854-25-1C18H21NO5
- 11-Hydroxycephalotaxine49686-55-7C18H21NO5
- Cephalotaxine beta-N-oxide488856-88-8C18H21NO5
- 4,4-Dimethyl-3-(4-nitrophenyl)-2-oxaspiro[5.5]undecane-1,5-dione361469-82-1C18H21NO5
- Ethyl 1-[(6-hydroxy-2-oxochromen-4-yl)methyl]piperidine-4-carboxylate887210-29-9C18H21NO5
- 1-(3-((Dimethylamino)methyl)-2,4-dihydroxyphenyl)-2-(3-methoxyphenoxy)ethanone1021218-39-2C18H21NO5
- Amikhelline4439-67-2C18H21NO5
- Methyl 1-((7-hydroxy-8-methyl-2-oxo-2H-chromen-4-yl)methyl)piperidine-4-carboxylate903189-70-8C18H21NO5
- Methyl 3-(2-oxo-2H-pyran-5-amido)adamantane-1-carboxylate1207030-08-7C18H21NO5
- AmberlineC18H21NO5
- Crivelline545-16-4C18H21NO5
- (7,7-Dimethyl-6,8-dioxa-2-azaspiro[3.5]nonan-2-yl)(7-methoxybenzofuran-2-yl)methanone1396844-31-7C18H21NO5
- Sternbergine96253-76-8C18H21NO5
- 1-[3-(2-Ethoxyphenoxy)propoxy]-4-methyl-2-nitrobenzene6478-26-8C18H21NO5
- N-(4-Hydroxy-2,5-dimethylphenyl)-3,4,5-trimethoxybenzamide321948-09-8C18H21NO5
- 4-Hydroxycephalotaxine84567-08-8C18H21NO5
- [5-(3,4-Dimethoxyphenyl)-1,2-oxazol-3-yl]methyl cyclopentanecarboxylate953177-35-0C18H21NO5
- Crinan-12-ol, 1,2-didehydro-3alpha,7-dimethoxy-C18H21NO5
- Cephalotaxine, 2,11-epoxy-1,2-dihydro-, (2alpha,11alpha)-51151-93-0C18H21NO5
- 8beta-Hydroxyoxycodone23185-97-9C18H21NO5
- Alkaloid DC18H21NO5
- Benzeneacetic acid, 2-methoxy-5-(((2-methyl-3-furanyl)carbonyl)amino)-, 1-methylethyl ester178869-96-0C18H21NO5
- 8-(2-Oxo-2H-chromene-3-carboxamido)octanoic acid204852-90-4C18H21NO5
- N-(4-Ethoxyphenyl)-3,4,5-trimethoxybenzamide4043-16-7C18H21NO5
- (2S,3S)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-3-(naphthalen-2-yl)propanoic acid959583-98-3C18H21NO5
- 2-{[(tert-Butoxy)carbonyl]amino}-3-(6-hydroxynaphthalen-2-yl)propanoic acid1259961-38-0C18H21NO5
- (1R,3aS,6aR)-rel-2-Benzyl 1-ethyl 4-oxohexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylate402958-21-8C18H21NO5
- 8-Hydroxyoxycodone, 8alpha-865844-01-5C18H21NO5
- 3-[3-Acetyl-4-hydroxy-2-(4-isopropyl-phenyl)-5-oxo-2,5-dihydro-pyrrol-1-yl]-propionic acid436088-35-6C18H21NO5
- Oxalic acid--3-[6-(prop-2-yn-1-yl)-6-azabicyclo[3.2.1]octan-1-yl]phenol (1/1)61226-56-0C18H21NO5
- Megistonine I321553-08-6C18H21NO5
- 3-[3-(Ethoxycarbonyl)-5-(4-methoxyphenyl)-2-methyl-1H-pyrrol-1-yl]propanoic acid853104-97-9C18H21NO5
- (Z)-Ethyl 1-((6-hydroxy-7-methyl-3-oxobenzofuran-2(3H)-ylidene)methyl)piperidine-3-carboxylate946384-39-0C18H21NO5
- RefChem:3813285768-69-4C18H21NO5
- 4-(1,4-Dioxa-8-azaspiro[4.5]decan-8-ylmethyl)-7-methoxy-2H-chromen-2-one859868-50-1C18H21NO5
- 3-Acetyl-4-hydroxy-2-(4-methoxyphenyl)-1-(oxolan-2-ylmethyl)-2H-pyrrol-5-one337923-58-7C18H21NO5
- 6-(3-Acetyl-4-hydroxy-5-oxo-2-phenyl-2,5-dihydro-1H-pyrrol-1-yl)hexanoic acid220128-08-5C18H21NO5
- Ethyl 1-[(2E)-3-(1,3-benzodioxol-5-yl)prop-2-enoyl]piperidine-3-carboxylate349541-60-2C18H21NO5
- (Z)-Ethyl 1-((6-hydroxy-7-methyl-3-oxobenzofuran-2(3H)-ylidene)methyl)piperidine-4-carboxylate946384-43-6C18H21NO5
- (2R,3R)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-3-(naphthalen-2-yl)propanoic acid1217602-85-1C18H21NO5
- N-(2,4-Dimethoxyphenyl)-2-(3,4-dimethoxyphenyl)acetamide349407-99-4C18H21NO5
- 4-(1,4-Dioxa-8-azaspiro[4.5]decan-8-ylmethyl)-6-hydroxy-7-methylchromen-2-one859108-21-7C18H21NO5
- 3,4,5-Trimethoxy-N-[(2-methoxyphenyl)methyl]benzamide346704-38-9C18H21NO5
- 2-Benzyl 1-ethyl (3aR,6aS)-4-oxo-octahydrocyclopenta[c]pyrrole-1,2-dicarboxylate158340-62-6C18H21NO5
- 3-Acetyl-1-(3,4-dimethoxyphenethyl)-4-hydroxy-6-methylpyridin-2(1H)-one914220-26-1C18H21NO5
- N-(4-Hydroxy-3,5-dimethylphenyl)-3,4,5-trimethoxybenzamide321688-24-8C18H21NO5
- N-(3,5-Dimethoxyphenyl)-2-(4-methoxyphenoxy)propanamide701241-55-6C18H21NO5
- N-(4-Hydroxy-2,3-dimethylphenyl)-3,4,5-trimethoxybenzamide321949-82-0C18H21NO5
- 6-{[4-(Methoxycarbonyl)phenyl]carbamoyl}-3,4-dimethylcyclohex-3-ene-1-carboxylic acid904812-08-4C18H21NO5
- 10-Alfa-hydroxyoxycodone96453-12-2C18H21NO5
- (E)-Methyl 5-(((4-methoxyphenyl)amino)methylene)-2,2-dimethyl-4,6-dioxocyclohexanecarboxylate331964-99-9C18H21NO5
- Acetamide, N-(phenylmethyl)-2-(3,4,5-trimethoxyphenoxy)-24789-76-2C18H21NO5
- Dimethyl 4-(4-propoxyphenyl)-1,4-dihydropyridine-3,5-dicarboxylate347351-20-6C18H21NO5
- Ethyl 4-(2-hydroxybenzylidene)-1-(2-methoxyethyl)-2-methyl-5-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate444777-78-0C18H21NO5
- 4-(3,4,5-Trimethoxyphenyl)-1,3,4,6,7,8-hexahydroquinoline-2,5-dione727666-81-1C18H21NO5
- 4-(2,4,5-Trimethoxyphenyl)-1,3,4,6,7,8-hexahydroquinoline-2,5-dione727676-84-8C18H21NO5
- 3-{[5-(Methoxycarbonyl)-2-methylphenyl]carbamoyl}bicyclo[2.2.1]heptane-2-carboxylic acid1005148-61-7C18H21NO5
- 3-[(1,3-Benzodioxol-5-ylmethyl)carbamoyl]bicyclo[2.2.2]octane-2-carboxylic acid904787-83-3C18H21NO5
- Morphinan-6-one, 7,8-didehydro-4,5-alpha-epoxy-14-hydroxy-3-methoxy-17-methyl-, N-oxide19763-77-0C18H21NO5
- 8-Benzyl 3-ethyl 2-oxo-8-azabicyclo[3.2.1]octane-3,8-dicarboxylate2307736-42-9C18H21NO5
- 2,3,4-Trimethoxy-N-(2-phenoxyethyl)benzamide423729-74-2C18H21NO5
- (2S,3S)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-3-(naphthalen-1-yl)propanoic acid959583-61-0C18H21NO5
- 8-Ethoxy-2-oxo-N-[1-(oxolan-2-yl)ethyl]chromene-3-carboxamide894663-04-8C18H21NO5
- 5-Oxo-5-(4-oxospiro[chroman-2,4'-piperidin]-1'-yl)pentanoic acid877811-35-3C18H21NO5
- Diethyl 1,2,3-trimethyl-6-oxo-2,6-dihydrocyclohepta[c]pyrrole-5,7-dicarboxylate57015-29-9C18H21NO5
- Ethyl 1-[1-(ethoxycarbonyl)propyl]-3-formyl-1H-indole-2-carboxylate903158-59-8C18H21NO5
- (3AR,6aS)-2-benzyl 1-ethyl 4-oxohexahydrocyclopenta[c]pyrrole-1,2(1H)-dicarboxylate1958050-40-2C18H21NO5
- 1-(3-Carboxy-4-hydroxy-phenyl)-2,5-dimethyl-1H-pyrrole-3-carboxylic acid tert-butyl ester1427469-78-0C18H21NO5
- (E)-Methyl 5-(((2-methoxyphenyl)amino)methylene)-2,2-dimethyl-4,6-dioxocyclohexanecarboxylate383163-43-7C18H21NO5
- 2,4,5-Trimethoxy-N-(2-methoxybenzyl)benzamide695173-80-9C18H21NO5
- 2,3,4-Trimethoxy-N-(3-methoxy-4-methylphenyl)benzamide698987-17-6C18H21NO5
- Methyl (4Z)-4-(3-ethoxy-4-hydroxybenzylidene)-1-ethyl-2-methyl-5-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate593241-85-1C18H21NO5
- 4-Ethoxy-N-(3,4,5-trimethoxyphenyl)benzamide838876-14-5C18H21NO5
- 2,4(1H,3H)-Pyridinedione, 3,3-diethyl-1-(3,5-dimethoxybenzoyl)-74401-77-7C18H21NO5
Frequently asked questions
What is the molar mass of C18H21NO5?
The molar mass of C18H21NO5 is 331.37 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 5 oxygen atoms. The monoisotopic mass is 331.1420 Da.
How many compounds have the formula C18H21NO5?
CompoundList lists 190 compounds with the molecular formula C18H21NO5, including Tazettine, Protokylol, Pretazettine. 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 C18H21NO5?
C18H21NO5 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.