Molecular formula
C18H21N3O4
333 compounds have this formula on CompoundList.
- Molar mass
- 343.38g/mol
- Monoisotopic mass
- 347.1783Da
- Atoms
- 46
- Elements
- 4
- Rings plus double bonds
- 10
The formula C18H21N3O4 describes a molecule made of 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms 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 × 1862.96%12.011 × 18 = 216.198 g/mol
- H Hydrogen × 216.16%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 312.24%14.007 × 3 = 42.021 g/mol
- O Oxygen × 418.64%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C18H21N3O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 201 to 300 of 333 compounds
![N-{2-[2-(2,5-Dioxopyrrolidin-1-yl)ethoxy]ethyl}-2-(1H-indol-1-yl)acetamide chemical structure, C18H21N3O4, CAS 2034538-36-6](/s/AMKQNYLTNBQUSW-UHFFFAOYSA-N.svg)
N-{2-[2-(2,5-Dioxopyrrolidin-1-yl)ethoxy]ethyl}-2-(1H-indol-1-yl)acetamide
CAS 2034538-36-6C18H21N3O4
2-(3,4-Dimethoxyphenyl)-1-(3-(pyrimidin-2-yloxy)pyrrolidin-1-yl)ethanone
CAS 2034473-76-0C18H21N3O4
2-(3,4-Dimethoxyphenyl)-1-(3-(pyrimidin-4-yloxy)pyrrolidin-1-yl)ethanone
CAS 2034246-63-2C18H21N3O4
2-(2-Methoxyphenoxy)-1-(3-((2-methylpyrimidin-4-yl)oxy)pyrrolidin-1-yl)ethanone
CAS 2034318-27-7C18H21N3O4
2-(2-Methoxyphenoxy)-1-(3-(pyrimidin-2-yloxy)piperidin-1-yl)ethanone
CAS 2034278-26-5C18H21N3O4
2-(2-Methoxyphenoxy)-1-(3-(pyrimidin-4-yloxy)piperidin-1-yl)ethanone
CAS 2034476-50-9C18H21N3O4
![3,5-Dimethoxy-N-(2-{3-oxo-2H,3H,5H,6H,7H-cyclopenta[c]pyridazin-2-yl}ethyl)benzamide chemical structure, C18H21N3O4, CAS 2034496-15-4](/s/RJTXTSVRKZWFLK-UHFFFAOYSA-N.svg)
3,5-Dimethoxy-N-(2-{3-oxo-2H,3H,5H,6H,7H-cyclopenta[c]pyridazin-2-yl}ethyl)benzamide
CAS 2034496-15-4C18H21N3O4
![2-(2-Methoxyphenoxy)-N-(2-(3-oxo-3,5,6,7-tetrahydro-2H-cyclopenta[c]pyridazin-2-yl)ethyl)acetamide chemical structure, C18H21N3O4, CAS 2034565-35-8](/s/SLGDXYAFZYFVQW-UHFFFAOYSA-N.svg)
2-(2-Methoxyphenoxy)-N-(2-(3-oxo-3,5,6,7-tetrahydro-2H-cyclopenta[c]pyridazin-2-yl)ethyl)acetamide
CAS 2034565-35-8C18H21N3O4
3-(4-Cyanophenyl)-N-(2-(2-(2,5-dioxopyrrolidin-1-yl)ethoxy)ethyl)propanamide
CAS 2034311-61-8C18H21N3O4
N-(2-(3-Cyclopropyl-6-oxopyridazin-1(6H)-yl)ethyl)-2-(2-methoxyphenoxy)acetamide
CAS 2097857-14-0C18H21N3O4
Oxan-4-yl 3-(quinoxalin-2-yloxy)pyrrolidine-1-carboxylate
CAS 2097883-46-8C18H21N3O4
![2-[(2,2-Dimethyl-2,3-dihydro-1-benzofuran-7-yl)oxy]-N-[2-(2-oxo-1,2-dihydropyrimidin-1-yl)ethyl]acetamide chemical structure, C18H21N3O4, CAS 2176069-05-7](/s/DQRFKAXYPCTIMJ-UHFFFAOYSA-N.svg)
2-[(2,2-Dimethyl-2,3-dihydro-1-benzofuran-7-yl)oxy]-N-[2-(2-oxo-1,2-dihydropyrimidin-1-yl)ethyl]acetamide
CAS 2176069-05-7C18H21N3O4
![3-[4-(4-Hydroxypiperidin-4-yl)-1-oxo-2,3-dihydro-1H-isoindol-2-yl]piperidine-2,6-dione chemical structure, C18H21N3O4, CAS 2154343-14-1](/s/CKTUBLFSOUAIBE-UHFFFAOYSA-N.svg)
3-[4-(4-Hydroxypiperidin-4-yl)-1-oxo-2,3-dihydro-1H-isoindol-2-yl]piperidine-2,6-dione
CAS 2154343-14-1C18H21N3O4
![5-[(2S)-1-Prop-2-ynylpyrrolidin-2-yl]-3-(3,4,5-trimethoxyphenyl)-1,2,4-oxadiazole chemical structure, C18H21N3O4, CAS 2223095-33-6](/s/XBQABFQGOORCFK-ZDUSSCGKSA-N.svg)
5-[(2S)-1-Prop-2-ynylpyrrolidin-2-yl]-3-(3,4,5-trimethoxyphenyl)-1,2,4-oxadiazole
CAS 2223095-33-6C18H21N3O4
1-(4-Acetylpiperazin-1-yl)-2-(5-(3-methoxyphenyl)isoxazol-3-yl)ethanone
CAS 953253-67-3C18H21N3O4
![3-[4-(Carbamoylmethoxy)-3-methoxyphenyl]-N-(1-cyanocyclobutyl)-N-methylprop-2-enamide chemical structure, C18H21N3O4, CAS 1356819-53-8](/s/NUDNVMNFZREBOO-FNORWQNLSA-N.svg)
3-[4-(Carbamoylmethoxy)-3-methoxyphenyl]-N-(1-cyanocyclobutyl)-N-methylprop-2-enamide
CAS 1356819-53-8C18H21N3O4
N-(2,4-Dimethoxyphenyl)-2-(4-oxo-5,6,7,8-tetrahydroquinazolin-3(4H)-yl)acetamide
CAS 1251692-37-1C18H21N3O4
![Ethyl {[1-(1H-indol-2-ylcarbonyl)piperidin-4-yl]amino}(oxo)acetate chemical structure, C18H21N3O4, CAS 1282132-06-2](/s/QTPSPXKHMRPYMZ-UHFFFAOYSA-N.svg)
Ethyl {[1-(1H-indol-2-ylcarbonyl)piperidin-4-yl]amino}(oxo)acetate
CAS 1282132-06-2C18H21N3O4
(5-Formyl-pyridin-2-yl)-(6-methoxy-pyridin-3-ylmethyl)-carbamic acid tert-butyl ester
CAS 1029053-01-7C18H21N3O4
![1-[4-(2-Cyclohexyl-1H-imidazol-1-yl)-2-methoxy-5-nitrophenyl]ethanone chemical structure, C18H21N3O4, CAS 1033716-80-1](/s/JZWQTCGBHDFHDO-UHFFFAOYSA-N.svg)
1-[4-(2-Cyclohexyl-1H-imidazol-1-yl)-2-methoxy-5-nitrophenyl]ethanone
CAS 1033716-80-1C18H21N3O4
1-(4-Nitro-3-(2-(piperidin-1-yl)ethoxy)phenyl)pyridin-2(1H)-one
CAS 955133-22-9C18H21N3O4
![Ethyl 5-[(tert-butoxycarbonyl)amino]-2,3'-bipyridine-5'-carboxylate chemical structure, C18H21N3O4, CAS 908581-07-7](/s/UIJNMHMFZROBNP-UHFFFAOYSA-N.svg)
Ethyl 5-[(tert-butoxycarbonyl)amino]-2,3'-bipyridine-5'-carboxylate
CAS 908581-07-7C18H21N3O4
Ethyl (4-morpholin-4-yl-6-oxo-1-phenyl-1,6-dihydropyrimidin-2-yl)acetate
CAS 1417746-05-4C18H21N3O4
Methyl 3-(6-methoxy-5-morpholinopyridazin-3-yl)-4-methylbenzoate
CAS 1800401-50-6C18H21N3O4
- N-(3,5-Dimethoxyphenyl)-3-(pyridin-2-yloxy)pyrrolidine-1-carboxamide1903575-67-6C18H21N3O4
- Methyl 1',2-dimethyl-5'-morpholino-6'-oxo-1',6'-dihydro-[3,3'-bipyridine]-5-carboxylate1800400-05-8C18H21N3O4
- N-(1-(Benzofuran-2-yl)propan-2-yl)-4-ethyl-2,3-dioxopiperazine-1-carboxamide2034380-47-5C18H21N3O4
- N-(2,3-Dimethoxyphenyl)-3-(pyridin-4-yloxy)pyrrolidine-1-carboxamide2034472-58-5C18H21N3O4
- 5-[(tert-Butoxy)methyl]-N-(2-oxo-1-phenylazetidin-3-yl)-1,2-oxazole-3-carboxamide2093504-72-2C18H21N3O4
- Ethyl 4-{[(1-cyanocyclobutyl)carbamoyl]methyl}-3,4-dihydro-2H-1,4-benzoxazine-6-carboxylate1935698-79-5C18H21N3O4
- 2-Methyl-1-oxo-1-[3-(quinoxalin-2-yloxy)pyrrolidin-1-yl]propan-2-yl acetate2097894-85-2C18H21N3O4
- 2-{2-[3-(3,5-Dimethyl-1H-pyrazol-4-yl)morpholin-4-yl]-2-oxoethoxy}benzaldehyde2224139-71-1C18H21N3O4
- N-Methyl-N-[2-oxo-2-[5-(2-oxo-1,3-oxazolidin-3-yl)-3,4-dihydro-1H-isoquinolin-2-yl]ethyl]prop-2-enamide2361886-52-2C18H21N3O4
- tert-Butyl 2-(4-(methoxycarbonyl)phenyl)-2,6-dihydropyrrolo[3,4-c]pyraZole-5(4H)-carboxylate1959556-60-5C18H21N3O4
- 2-(1-(2,4-Dihydroxy-3-methylphenyl)propylidene)-N-(3-hydroxybenzyl)hydrazine-1-carboxamideC18H21N3O4
- (S)-2-((tert-Butoxycarbonyl)amino)-3-(2-phenylpyrimidin-5-yl)propanoic acid2387566-95-0C18H21N3O4
- 1,3-Diethyl 2-[[(1-methyl-3-phenyl-1H-pyrazol-5-yl)amino]methylene]propanedioate20481-34-9C18H21N3O4
- 5-[4-(1H-Indole-2-carbonyl)piperazin-1-yl]-5-oxopentanoic acid1007679-41-5C18H21N3O4
- N-[3-[(2-Aminoacetyl)amino]-4-methylphenyl]-3,5-dimethoxybenzamide1181356-94-4C18H21N3O4
- 4-(3-(tert-Butyl)-1,2,4-oxadiazol-5-yl)-1-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)pyrrolidin-2-one1171799-55-5C18H21N3O4
- 3-Cyclopropyl-5-phenoxycarbonylamino-pyrazole-1-carboxylic acid tert-butyl ester1229454-51-6C18H21N3O4
- Ethyl 2-((4-hydroxycyclohexyl)oxy)acetate1565592-33-7C18H21N3O4
- 3-Quinolinecarbonitrile, 1,4-dihydro-6-methoxy-7-[3-(4-morpholinyl)propoxy]-4-oxo-1369509-89-6C18H21N3O4
- 2-Cyano-5-(dimethylamino)-4-(3-nitrophenyl)-2,4-pentadienoic acid 1,1-dimethylethyl ester897373-56-7C18H21N3O4
- 7-[(Benzyloxy)carbonyl]-2-propyl-5H,6H,7H,8H-imidazo[1,2-a]pyrazine-3-carboxylic acid2060043-40-3C18H21N3O4
- 7-[(Benzyloxy)carbonyl]-2-(propan-2-yl)-5H,6H,7H,8H-imidazo[1,2-a]pyrazine-3-carboxylic acid2059966-83-3C18H21N3O4
- 1-{1-[(tert-Butoxy)carbonyl]-1,2,3,6-tetrahydropyridin-4-yl}imidazo[1,5-a]pyridine-3-carboxylic acid2059993-37-0C18H21N3O4
- 3-{1-[(Benzyloxy)carbonyl]piperidin-4-yl}-1-methyl-1H-pyrazole-5-carboxylic acid2059946-87-9C18H21N3O4
- 1-{1-[(Benzyloxy)carbonyl]piperidin-4-yl}-3-methyl-1H-pyrazole-4-carboxylic acid2090464-81-4C18H21N3O4
- 3-{1-[(Benzyloxy)carbonyl]piperidin-3-yl}-1-methyl-1H-pyrazole-5-carboxylic acid2060034-26-4C18H21N3O4
- 4-(5-Aminopentyl)-2-(2,6-dioxo-3-piperidyl)isoindoline-1,3-dione2093388-15-7C18H21N3O4
- 3-(3-Oxo-6-piperidin-4-yloxy-1H-isoindol-2-yl)piperidine-2,6-dione2222115-81-1C18H21N3O4
- 2-{[1-(3,4-Dimethoxybenzoyl)azetidin-3-yl]methyl}-6-methyl-2,3-dihydropyridazin-3-one2309569-40-0C18H21N3O4
- 2-{[1-(2,3-Dimethoxybenzoyl)azetidin-3-yl]methyl}-6-methyl-2,3-dihydropyridazin-3-one2320418-08-2C18H21N3O4
- 2-{[1-(2,4-Dimethoxybenzoyl)azetidin-3-yl]methyl}-6-methyl-2,3-dihydropyridazin-3-one2320418-34-4C18H21N3O4
- N-[(2H-1,3-Benzodioxol-5-yl)methyl]-2-(2-methyl-6-oxo-4-propyl-1,6-dihydropyrimidin-1-yl)acetamide2310125-55-2C18H21N3O4
- N-[6-(5-Cyclopropyl-1,2,4-oxadiazol-3-yl)-2,3-dihydro-3-benzofuranyl]carbamic acid 1,1-dimethylethyl ester2364560-84-7C18H21N3O4
- 2-(3,5-Dimethoxyphenyl)-8,9,10,11-tetrahydro-2H-7,11-epiminopyrazino[1,2-a]azocine-3,6(4H,7H)-dione475301-76-9C18H21N3O4
- 2-(2,6-Dioxo-3-piperidyl)-5-(pentylamino)isoindoline-1,3-dione1809556-66-8C18H21N3O4
- N-[2-(Methoxymethyl)-1,3-benzoxazol-5-yl]-1-(prop-2-enoyl)piperidine-4-carboxamide2361840-87-9C18H21N3O4
- 3-(3,5-Dimethyl-1,2-oxazol-4-yl)-N-{[5-(3,5-dimethyl-1,2-oxazol-4-yl)furan-2-yl]methyl}propanamide2415454-45-2C18H21N3O4
- 2-(2,6-Dioxo-3-piperidyl)-1-oxo-N-sec-butyl-isoindoline-5-carboxamide2390706-14-4C18H21N3O4
- 2-(2,6-Dioxo-3-piperidyl)-N-isobutyl-1-oxo-isoindoline-4-carboxamide2404339-89-3C18H21N3O4
- Methyl (S)-2-(Boc-amino)-3-(4-cyano-3-indolyl)propanoate2101951-88-4C18H21N3O4
- Benzyl 2-[(2S)-2-amino-3-(benzyloxy)propanoyl]hydrazine-1-carboxylate47461-72-3C18H21N3O4
- 3-(3-Nitrobenzoyl)decahydro-8H-1,5-methanopyrido[1,2-a][1,5]diazocin-8-one83459-52-3C18H21N3O4
- 3-(4-Nitrobenzoyl)decahydro-8H-1,5-methanopyrido[1,2-a][1,5]diazocin-8-one83459-54-5C18H21N3O4
- N-(4-Methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-5-yl)-1-(prop-2-enoyl)piperidine-4-carboxamide2411230-01-6C18H21N3O4
- N-[[2-(2,6-Dioxo-3-piperidyl)-3-oxo-isoindolin-5-yl]methyl]butanamide2761406-53-3C18H21N3O4
- N-[2-(2,6-Dioxo-3-piperidyl)-3-oxo-isoindolin-5-yl]-2,2-dimethyl-propanamide2761391-81-3C18H21N3O4
- 3-(5-((S)-3-(Hydroxymethyl)pyrrolidin-1-yl)-1-oxoisoindolin-2-yl)piperidine-2,6-dione2758532-82-8C18H21N3O4
- (E)-5,10,11,11a-Tetrahydro-8,11-dimethoxy-8-methyl-5-oxo-1H-pyrrolo(2,1-c)(1,4)benzodiazepine-2-acrylamide19483-02-4C18H21N3O4
- Methyl 3-amino-5-(2-((tert-butoxycarbonyl)amino)pyridin-4-yl)benzoate823215-50-5C18H21N3O4
- N-[2-(2,6-Dioxo-3-piperidyl)-1-oxo-isoindolin-4-yl]pentanamide444289-18-3C18H21N3O4
- N-(3,5-Dimethoxyphenyl)-2-(4-oxo-3,4,5,6,7,8-hexahydroquinazolin-3-yl)acetamide1251614-89-7C18H21N3O4
- 5-Nitro-2-{[2-phenyl-3-(propan-2-yl)-1,3-oxazolidin-5-yl]methoxy}pyridine54126-78-2C18H21N3O4
- tert-Butyl 2-(4-(1H-indol-3-yl)-4-methyl-2,5-dioxoimidazolidin-1-yl)acetate1888418-86-7C18H21N3O4
- tert-Butyl 2-(4-(1-methyl-1H-indol-3-yl)-2,5-dioxoimidazolidin-1-yl)acetate1888418-70-9C18H21N3O4
- 5-(5-Aminopentyl)-2-(2,6-dioxo-3-piperidyl)isoindoline-1,3-dione2924611-90-3C18H21N3O4
- N-(3,4,5-Trimethoxyphenyl)-5,6,7,8-tetrahydroquinazoline-4-carboxamide2415554-82-2C18H21N3O4
- N-(3,5-Dimethoxyphenyl)-6-(oxan-4-yl)pyrimidine-4-carboxamide2415541-73-8C18H21N3O4
- N-[2-(2,6-Dioxo-3-piperidyl)-1-oxo-isoindolin-4-yl]-2,2-dimethyl-propanamide2321633-67-2C18H21N3O4
- Benzyl 4-(5-(methoxycarbonyl)-1H-imidazol-2-yl)piperidine-1-carboxylate2841187-25-3C18H21N3O4
- 2,3,4-Trimethoxy-N-[1-(pyridin-2-yl)azetidin-3-yl]benzamide2415598-88-6C18H21N3O4
- 8-(1,3-Benzoxazol-2-yl)-3-tert-butyl-1-oxa-3,8-diazaspiro[4.5]decane-2,4-dione2741933-87-7C18H21N3O4
- 5-[(Benzyloxy)carbonyl]-2-butyl-2H,4H,5H,6H-pyrrolo[3,4-c]pyrazole-4-carboxylic acid2137507-41-4C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(2-cyclopropyl-1H-imidazol-1-yl)-2-methylpropanoic acid2138525-83-2C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(4-cyclobutyl-1H-pyrazol-1-yl)propanoic acid2137472-79-6C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(4-cyclopropyl-1H-pyrazol-1-yl)butanoic acid2137534-69-9C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(2-cyclopropyl-1H-imidazol-1-yl)butanoic acid2137513-15-4C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-2-cyclopropyl-3-(4-methyl-1H-pyrazol-1-yl)propanoic acid2138043-30-6C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-2-cyclopropyl-3-(2-methyl-1H-imidazol-1-yl)propanoic acid2138090-51-2C18H21N3O4
- 2-{[(Benzyloxy)carbonyl]amino}-3-(4,5,6,7-tetrahydro-1H-1,3-benzodiazol-1-yl)propanoic acid2137534-86-0C18H21N3O4
- 2-[(2-Aminoethyl)(benzyl)carbamoyl]-5-(methoxymethyl)pyridine-3-carboxylic acid2138529-16-3C18H21N3O4
- 1-[(Benzyloxy)carbonyl]-4-(1-ethyl-1H-imidazol-5-yl)pyrrolidine-3-carboxylic acid2171927-18-5C18H21N3O4
- 1-[(Benzyloxy)carbonyl]-4-(1-ethyl-1H-pyrazol-4-yl)pyrrolidine-3-carboxylic acid2172310-99-3C18H21N3O4
- 1-[(Benzyloxy)carbonyl]-4-(1-ethyl-1H-imidazol-2-yl)pyrrolidine-3-carboxylic acid2172201-44-2C18H21N3O4
- 1-[(Benzyloxy)carbonyl]-4-(1,4-dimethyl-1H-pyrazol-5-yl)pyrrolidine-3-carboxylic acid2172512-18-2C18H21N3O4
- tert-Butyl N-[3-(1-benzofuran-2-yl)-1-(2-hydroxyethyl)-1H-pyrazol-5-yl]carbamate2408959-68-0C18H21N3O4
- tert-Butyl N-[6-(3-hydroxybenzamido)-5-methylpyridin-3-yl]carbamate2413904-88-6C18H21N3O4
Frequently asked questions
What is the molar mass of C18H21N3O4?
The molar mass of C18H21N3O4 is 343.38 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms, 3 nitrogen atoms and 4 oxygen atoms. The monoisotopic mass is 347.1783 Da.
How many compounds have the formula C18H21N3O4?
CompoundList lists 333 compounds with the molecular formula C18H21N3O4, including N-{2-[2-(2,5-Dioxopyrrolidin-1-yl)ethoxy]ethyl}-2-(1H-indol-1-yl)acetamide, 2-(3,4-Dimethoxyphenyl)-1-(3-(pyrimidin-2-yloxy)pyrrolidin-1-yl)ethanone, 2-(3,4-Dimethoxyphenyl)-1-(3-(pyrimidin-4-yloxy)pyrrolidin-1-yl)ethanone. 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 C18H21N3O4?
C18H21N3O4 has a degree of unsaturation of 10. 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.