Molecular formula
C21H21NO4
403 compounds have this formula on CompoundList.
- Molar mass
- 351.40g/mol
- Monoisotopic mass
- 356.1784Da
- Atoms
- 47
- Elements
- 4
- Rings plus double bonds
- 12
The formula C21H21NO4 describes a molecule made of 21 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 × 2171.78%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 216.02%1.008 × 21 = 21.168 g/mol
- N Nitrogen × 13.99%14.007 × 1 = 14.007 g/mol
- O Oxygen × 418.21%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C21H21NO4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 200 of 403 compounds
![{2-[2-(Dimethylamino)vinyl]-5-methoxy-1-benzofuran-3-yl}(4-methoxyphenyl)methanone chemical structure, C21H21NO4, CAS 5275-55-8](/s/WUTDGJJRZBZWST-VAWYXSNFSA-N.svg)
{2-[2-(Dimethylamino)vinyl]-5-methoxy-1-benzofuran-3-yl}(4-methoxyphenyl)methanone
CAS 5275-55-8C21H21NO4
1-(4-Methoxyphenyl)-1-oxopropan-2-yl 3-(1H-indol-3-yl)propanoate
CAS 886128-46-7C21H21NO4
7-Hydroxy-3-(3-methoxyphenyl)-8-(pyrrolidin-1-ylmethyl)-2H-chromen-2-one
CAS 951943-43-4C21H21NO4
![3-(4-Methoxyphenyl)-9-propyl-9,10-dihydro-4H,8H-chromeno[8,7-e][1,3]oxazin-4-one chemical structure, C21H21NO4, CAS 1010930-72-9](/s/IZTPCJCPPGOMIG-UHFFFAOYSA-N.svg)
3-(4-Methoxyphenyl)-9-propyl-9,10-dihydro-4H,8H-chromeno[8,7-e][1,3]oxazin-4-one
CAS 1010930-72-9C21H21NO4
Antituberculosis agent-1
CAS 2411740-98-0C21H21NO4
7-Hydroxy-5-methoxy-2-phenyl-8-(pyrrolidin-1-ylmethyl)-4H-chromen-4-one
CAS 919728-62-4C21H21NO4
![N-[2-(2-Methoxyphenyl)-4-oxo-4H-chromen-6-yl]-2,2-dimethylpropanamide chemical structure, C21H21NO4, CAS 923221-16-3](/s/LRXFOXRMUUENIF-UHFFFAOYSA-N.svg)
N-[2-(2-Methoxyphenyl)-4-oxo-4H-chromen-6-yl]-2,2-dimethylpropanamide
CAS 923221-16-3C21H21NO4
7-Hydroxy-3-(4-methoxyphenyl)-8-(pyrrolidin-1-ylmethyl)-4H-chromen-4-one
CAS 637753-18-5C21H21NO4
![cis-3-[(9H-Fluoren-9-ylmethoxycarbonylamino)methyl]cyclobutanecarboxylic acid chemical structure, C21H21NO4, CAS 2101202-54-2](/s/BJFFZAFKQSTORF-UHFFFAOYSA-N.svg)
cis-3-[(9H-Fluoren-9-ylmethoxycarbonylamino)methyl]cyclobutanecarboxylic acid
CAS 2101202-54-2C21H21NO4
![N-(4-Ethoxyphenyl)-2-[(4-methylphenoxy)methyl]furan-3-carboxamide chemical structure, C21H21NO4, CAS 878716-05-3](/s/VWXIXUVBGZABAW-UHFFFAOYSA-N.svg)
N-(4-Ethoxyphenyl)-2-[(4-methylphenoxy)methyl]furan-3-carboxamide
CAS 878716-05-3C21H21NO4
![9-Isopropyl-3-(4-methoxyphenyl)-9,10-dihydrochromeno[8,7-e][1,3]oxazin-2(8H)-one chemical structure, C21H21NO4, CAS 946384-27-6](/s/VSAOOOMWWCOXJC-UHFFFAOYSA-N.svg)
9-Isopropyl-3-(4-methoxyphenyl)-9,10-dihydrochromeno[8,7-e][1,3]oxazin-2(8H)-one
CAS 946384-27-6C21H21NO4
(S)-(-)-O-Demethylbuchenavianine
CAS 91147-18-1C21H21NO4
4-(5-(4-(Pentyloxy)phenyl)-3-isoxazolyl)benzoic acid
CAS 179162-55-1C21H21NO4
![1-[1-(3,4-Dimethoxyphenyl)ethenyl]-6,7-dimethoxyisoquinoline chemical structure, C21H21NO4, CAS 58024-45-6](/s/XAJQQWJXGJCHBQ-UHFFFAOYSA-N.svg)
1-[1-(3,4-Dimethoxyphenyl)ethenyl]-6,7-dimethoxyisoquinoline
CAS 58024-45-6C21H21NO4
![N-Cyclopentyl-2-({4-methyl-6-oxo-6H-benzo[c]chromen-3-yl}oxy)acetamide chemical structure, C21H21NO4, CAS 500204-56-8](/s/YAZNSANLVBHLDS-UHFFFAOYSA-N.svg)
N-Cyclopentyl-2-({4-methyl-6-oxo-6H-benzo[c]chromen-3-yl}oxy)acetamide
CAS 500204-56-8C21H21NO4
![3-Hydroxy-2-[3-hydroxy-4-(pyrrolidin-1-yl)phenyl]-6,7-dimethylchromen-4-one chemical structure, C21H21NO4, CAS 1353224-67-5](/s/GZBMQCNHVIBXLU-UHFFFAOYSA-N.svg)
3-Hydroxy-2-[3-hydroxy-4-(pyrrolidin-1-yl)phenyl]-6,7-dimethylchromen-4-one
CAS 1353224-67-5C21H21NO4
(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)hex-5-enoic acid
CAS 851909-08-5C21H21NO4
Ochotensine
CAS 4959-88-0C21H21NO4
N-Fmoc-cyclopropyl alanine
CAS 1219163-22-0C21H21NO4
Fmoc-4,5-dehydro-l-leucine
CAS 87720-55-6C21H21NO4
N,N-Dimethyl-2-((2-oxo-4-(o-tolyl)-2H-chromen-7-yl)oxy)propanamide
CAS 2304621-31-4C21H21NO4
(R)-(+)-O-Demethylbuchenavianine
CAS 1364123-68-1C21H21NO4
![2-[1-(9H-Fluoren-9-ylmethoxycarbonyl)pyrrolidin-2-yl]acetic acid chemical structure, C21H21NO4, CAS 1340391-75-4](/s/ZNIGOUDZWCDFFC-UHFFFAOYSA-N.svg)
2-[1-(9H-Fluoren-9-ylmethoxycarbonyl)pyrrolidin-2-yl]acetic acid
CAS 1340391-75-4C21H21NO4
(R)-a-(Fmoc-amino)cyclobutaneacetic acid
CAS 923012-41-3C21H21NO4
- 1 suppliers(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)hex-5-enoic acid270263-04-2C21H21NO4
- 2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)cyclopentane-1-carboxylic acid282524-97-4C21H21NO4
- Ethyl 1,2-dimethyl-5-(4-methylbenzoyl)oxyindole-3-carboxylate4606-59-1C21H21NO4
- cis-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)cyclopentanecarboxylic acid1203556-26-6C21H21NO4
- 1 suppliers(R)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)hex-5-enoic acid865352-21-2C21H21NO4
- 1 suppliers2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)hex-5-enoic acid193223-97-1C21H21NO4
- 6-(3-(Dimethylamino)propoxy)-1-methyl-3H-benzofuro(2,3-f)(1)benzopyran-3-one351902-90-4C21H21NO4
- 3-(9H-Fluoren-9-ylmethoxycarbonylamino)cyclopentanecarboxylic acid929976-34-1C21H21NO4
- 1 suppliers(S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-2-cyclobutylacetic acid1391630-31-1C21H21NO4
- 1 suppliersFmoc-4,5-dehydro-D-Leucine917099-00-4C21H21NO4
- 2-(1-((3,4-Dimethoxyphenethyl)amino)ethylidene)-1H-indene-1,3(2H)-dione355430-61-4C21H21NO4
- Ethyl 2-methyl-6-oxo-4-(3-phenoxyphenyl)-1,4,5,6-tetrahydropyridine-3-carboxylate294853-71-7C21H21NO4
- 1-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-3-methylcyclobutane-1-carboxylic acid1699709-29-9C21H21NO4
- (4E)-4-[Hydroxy(phenyl)methylidene]-1-(2-methoxyethyl)-5-(4-methylphenyl)pyrrolidine-2,3-dione337506-47-5C21H21NO4
- (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)(methyl)amino)pent-4-enoic acid2606012-88-6C21H21NO4
- 3,4,5-Trimethoxy-N-(naphthalen-1-ylmethyl)benzamide329920-59-4C21H21NO4
- 3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)hex-5-enoic acid1072488-52-8C21H21NO4
- Benzyl 4-oxospiro[chroman-2,4'-piperidine]-1'-carboxylate873779-32-9C21H21NO4
- tert-Butyl 5-(benzyloxy)-3-formyl-1H-indole-1-carboxylate914348-98-4C21H21NO4
- 1-Fmoc-2-methyl-DL-proline433220-67-8C21H21NO4
- 7H-Dibenzo(de,g)quinolin-9-ol, 1,2,3-trimethoxy-7,7-dimethyl-81525-72-6C21H21NO4
- 4-(2-(1,3-Dioxoisoindolin-2-yl)ethyl)phenyl pivalate785849-99-2C21H21NO4
- Ethyl 3-(8-isopropylidene-1,3-dioxo-1,3,3A,4,7,7A-hexahydro-2H-4,7-methanoisoindol-2-yl)benzoate5830-73-9C21H21NO4
- 1-Boc-6-Benzyloxy-3-formylindole630110-71-3C21H21NO4
- 1-Boc-7-Benzyloxy-3-formylindole914348-99-5C21H21NO4
- 1-(2-(Allyloxy)benzyl)-3-hydroxy-3-(2-oxopropyl)indolin-2-one879043-13-7C21H21NO4
- Fmoc-Ala(alpha-cyclopropyl)-OH1926163-87-2C21H21NO4
- (2S,3S)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-3-methylpyrrolidine-2-carboxylic acid1228307-80-9C21H21NO4
- 2,4-Bis(2,4-dimethoxyphenyl)pyridine1592413-45-0C21H21NO4
- 2-Methyl-4-oxo-3-phenyl-4H-chromen-7-yl diethylcarbamate637752-89-7C21H21NO4
- Methyl 4-[2-(benzyloxy)phenyl]-2-methyl-6-oxo-1,4,5,6-tetrahydropyridine-3-carboxylate303140-12-7C21H21NO4
- 2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpent-4-enoic acid131177-58-7C21H21NO4
- (4E)-4-[Hydroxy(phenyl)methylidene]-1-(3-methoxypropyl)-5-phenylpyrrolidine-2,3-dione440091-87-2C21H21NO4
- (4E)-4-[Hydroxy(4-methylphenyl)methylidene]-1-(2-methoxyethyl)-5-phenylpyrrolidine-2,3-dione608121-17-1C21H21NO4
- 1-Boc-4-Benzyloxy-3-formylindole404888-01-3C21H21NO4
- (Z)-8-(2-Methoxyethyl)-2-(4-methylbenzylidene)-8,9-dihydro-2H-benzofuro[7,6-e][1,3]oxazin-3(7H)-one946385-04-2C21H21NO4
- (4S)-1-Fmoc-4-methyl-L-proline1228577-03-4C21H21NO4
- (2R,3R)-1-(9H-Fluoren-9-ylmethoxycarbonyl)-3-methyl-pyrrolidine-2-carboxylic acid2803402-18-6C21H21NO4
- Ethyl 5-(benzoyloxy)-1-ethyl-2-methyl-1H-indole-3-carboxylate102475-14-9C21H21NO4
- 6-Butyl-1,4-dihydro-4-oxo-7-(phenylmethoxy)quinoline-3-carboxylic acid94278-93-0C21H21NO4
- 4-(4-Ethoxyphenyl)-2-(1-methyl-1H-indol-3-yl)-4-oxobutanoic acid937605-01-1C21H21NO4
- (2Z)-6-Hydroxy-2-[(4-methylphenyl)methylidene]-7-(morpholin-4-ylmethyl)-1-benzofuran-3-one869078-08-0C21H21NO4
- (Z)-6-Hydroxy-2-(2-methoxybenzylidene)-7-(pyrrolidin-1-ylmethyl)benzofuran-3(2H)-one887214-29-1C21H21NO4
- 7-[2-(Morpholin-4-yl)ethoxy]-3-phenyl-2H-chromen-2-one903188-15-8C21H21NO4
- N-(2-(4-Methoxybenzoyl)-3-methylbenzofuran-6-yl)isobutyramide929472-09-3C21H21NO4
- N-(2-(4-Methoxybenzoyl)-3-methylbenzofuran-5-yl)isobutyramide929372-52-1C21H21NO4
- 2-(4-(4-Methoxyphenyl)-3-methylisoxazol-5-yl)-5-((2-methylallyl)oxy)phenol898913-97-8C21H21NO4
- 2-[4-(2-Methoxyphenyl)-3-methyl-1,2-oxazol-5-yl]-5-[(2-methylprop-2-en-1-yl)oxy]phenol903199-66-6C21H21NO4
- 2-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)-2-(1-methylcyclopropyl)acetic acid2138971-44-3C21H21NO4
- (Z)-2-(4-Isopropylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl dimethylcarbamate858763-09-4C21H21NO4
- Methyl 4-(4-ethoxyphenyl)-2-(1H-indol-3-yl)-4-oxobutanoate1023504-61-1C21H21NO4
- (Z)-2-(4-Methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl diethylcarbamate623116-34-7C21H21NO4
- 4-Methyl-2-oxo-3-phenyl-2H-chromen-7-yl diethylcarbamate869080-58-0C21H21NO4
- N-[3-(4-Methoxyphenyl)-8-methyl-4-oxo-4H-chromen-2-yl]butanamide879566-74-2C21H21NO4
- 7-(2-Morpholin-4-ylethoxy)-3-phenylchromen-4-one903184-91-8C21H21NO4
- 2-Isopropyl-4-(2-oxo-2-(p-tolyl)ethyl)benzo[f][1,4]oxazepine-3,5(2H,4H)-dione903590-64-7C21H21NO4
- (4Z)-12-(3-Methoxypropyl)-4-(phenylmethylidene)-3,10-dioxa-12-azatricyclo[7.4.0.0^{2,6}]trideca-1(9),2(6),7-trien-5-one946385-46-2C21H21NO4
- 3-(Cyclopropyl[(9H-fluoren-9-ylmethoxy)carbonyl]amino)propanoic acid1343275-93-3C21H21NO4
- 1H-Indole-3-acetic acid, 5-methoxy-2-methyl-1-(2-(4-methylphenyl)-2-oxoethyl)-106287-91-6C21H21NO4
- Methyl 1-(2-(4-isopropylphenoxy)acetyl)-1H-indole-3-carboxylate432527-65-6C21H21NO4
- 2-Oxo-N-[4-(pentyloxy)phenyl]-2H-chromene-3-carboxamide302572-68-5C21H21NO4
- (Z)-6-Hydroxy-2-(3-methylbenzylidene)-7-(morpholinomethyl)benzofuran-3(2H)-one896805-59-7C21H21NO4
- (Z)-6-Hydroxy-2-(2-methylbenzylidene)-7-(morpholinomethyl)benzofuran-3(2H)-one896828-82-3C21H21NO4
- (Z)-2-(2-Methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl diethylcarbamate622796-87-6C21H21NO4
- Butyl 4-[(3-methylbenzo[d]furan-2-yl)carbonylamino]benzoate313394-79-5C21H21NO4
- Ethyl 4-[3-[(4-methylphenyl)methyl]-2,5-dioxopyrrolidin-1-yl]benzoate497941-73-8C21H21NO4
- Xanthene-9-carboxylic acid, 9-hydroxy-, 3-quinuclidinyl ester102585-04-6C21H21NO4
- 2-(2,4-Diethoxyphenyl)-6-methylquinoline-4-carboxylic acid438215-70-4C21H21NO4
- N-Benzyl-3-(7-methoxy-4-methyl-2-oxo-2H-chromen-3-yl)propanamide853899-58-8C21H21NO4
- (Z)-2-(3-Methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl diethylcarbamate622796-82-1C21H21NO4
- N-(2-Ethoxyphenyl)-5-[(3-methylphenoxy)methyl]furan-2-carboxamide878716-09-7C21H21NO4
- (Z)-6-Hydroxy-2-(4-methoxybenzylidene)-7-(pyrrolidin-1-ylmethyl)benzofuran-3(2H)-one887214-54-2C21H21NO4
- N-(2,6-Diethylphenyl)-8-methoxy-2-oxo-2H-chromene-3-carboxamide873857-49-9C21H21NO4
- N-[3-(4-Methoxyphenyl)-8-methyl-4-oxo-4H-chromen-2-yl]-2-methylpropanamide883961-58-8C21H21NO4
- (Z)-2-Benzylidene-6-hydroxy-4-methyl-7-(morpholinomethyl)benzofuran-3(2H)-one904506-02-1C21H21NO4
- (Z)-6-Hydroxy-2-(3-methoxybenzylidene)-7-(pyrrolidin-1-ylmethyl)benzofuran-3(2H)-one929433-23-8C21H21NO4
Frequently asked questions
What is the molar mass of C21H21NO4?
The molar mass of C21H21NO4 is 351.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 21 hydrogen atoms, 1 nitrogen atom and 4 oxygen atoms. The monoisotopic mass is 356.1784 Da.
How many compounds have the formula C21H21NO4?
CompoundList lists 403 compounds with the molecular formula C21H21NO4, including {2-[2-(Dimethylamino)vinyl]-5-methoxy-1-benzofuran-3-yl}(4-methoxyphenyl)methanone, 1-(4-Methoxyphenyl)-1-oxopropan-2-yl 3-(1H-indol-3-yl)propanoate, 7-Hydroxy-3-(3-methoxyphenyl)-8-(pyrrolidin-1-ylmethyl)-2H-chromen-2-one. 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 C21H21NO4?
C21H21NO4 has a degree of unsaturation of 12. 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.