Molecular formula
C21H20O4
115 compounds have this formula on CompoundList.
- Molar mass
- 336.39g/mol
- Monoisotopic mass
- 336.1362Da
- Atoms
- 45
- Elements
- 3
- Rings plus double bonds
- 12
The formula C21H20O4 describes a molecule made of 21 carbon atoms, 20 hydrogen 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 × 2174.98%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 205.99%1.008 × 20 = 20.160 g/mol
- O Oxygen × 419.02%15.999 × 4 = 63.996 g/mol
Look up another formula
Compounds with the formula C21H20O4
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 100 of 115 compounds
4-Methoxylonchocarpin
CAS 51589-67-4C21H20O4
Danshenol A
CAS 189308-08-5C21H20O4
2,2'-(1-Phenylprop-1-yne-3,3-diyl)bis(3-hydroxycyclohex-2-en-1-one)
CAS 16807-58-2C21H20O4
3,3,5-Trimethyl-6-oxo-2-phenyl-3,6-dihydro-2H-pyran-4-yl benzoate
CAS 361468-06-6C21H20O4
![5-{[4-(2-Phenylpropan-2-yl)phenoxy]methyl}furan-2-carboxylic acid chemical structure, C21H20O4, CAS 332026-26-3](/s/GVVLHKRUHHNBIB-UHFFFAOYSA-N.svg)
5-{[4-(2-Phenylpropan-2-yl)phenoxy]methyl}furan-2-carboxylic acid
CAS 332026-26-3C21H20O4
![2',4'-Dihydroxy-3',6'',6''-trimethylpyrano[2'',3'':6',5']chalcone chemical structure, C21H20O4, CAS 20890-68-0](/s/ADEFODYSLAAMOM-MDZDMXLPSA-N.svg)
2',4'-Dihydroxy-3',6'',6''-trimethylpyrano[2'',3'':6',5']chalcone
CAS 20890-68-0C21H20O4
3-Hydroxy-6-(3-phenoxyphenyl)-2-propionyl-2-cyclohexen-1-one
CAS 866153-06-2C21H20O4
Obovatin methyl ether
CAS 69640-78-4C21H20O4
Maximaisoflavone J
CAS 16277-87-5C21H20O4
![3-[(4-Methoxybenzyl)oxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one chemical structure, C21H20O4, CAS 374767-88-1](/s/YFAIWWNUMQHALX-UHFFFAOYSA-N.svg)
3-[(4-Methoxybenzyl)oxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one
CAS 374767-88-1C21H20O4
![7-[(4-Methoxybenzyl)oxy]-6-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one chemical structure, C21H20O4, CAS 374766-05-9](/s/ZEWOHZKPMUYUJB-UHFFFAOYSA-N.svg)
7-[(4-Methoxybenzyl)oxy]-6-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one
CAS 374766-05-9C21H20O4
Dimethyl 11-methyl-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboxylate
CAS 5472-28-6C21H20O4
Lanceolatin A
CAS 41689-78-5C21H20O4
Hemileiocarpin
CAS 66446-92-2C21H20O4
Durlettone
CAS 60270-41-9C21H20O4
Danshenxinkun D
CAS 98873-76-8C21H20O4
![Ethyl 5-[(2-methylprop-2-en-1-yl)oxy]-2-phenyl-1-benzofuran-3-carboxylate chemical structure, C21H20O4, CAS 307552-24-5](/s/JCKWRKPCQFTKKR-UHFFFAOYSA-N.svg)
Ethyl 5-[(2-methylprop-2-en-1-yl)oxy]-2-phenyl-1-benzofuran-3-carboxylate
CAS 307552-24-5C21H20O4
2-Methyl-7-((3-methylbut-2-en-1-yl)oxy)-3-phenoxy-4H-chromen-4-one
CAS 374699-21-5C21H20O4
Pongachalcone I
CAS 41724-53-2C21H20O4
2-Methyl-4-oxo-3-phenyl-4H-chromen-7-yl 2,2-dimethylpropanoate
CAS 618391-09-6C21H20O4
![6-Ethyl-4-methyl-7-[2-(4-methylphenyl)-2-oxoethoxy]chromen-2-one chemical structure, C21H20O4, CAS 327048-30-6](/s/SVPOIIMPJLMVLL-UHFFFAOYSA-N.svg)
6-Ethyl-4-methyl-7-[2-(4-methylphenyl)-2-oxoethoxy]chromen-2-one
CAS 327048-30-6C21H20O4
Eryvarin D
CAS 406676-79-7C21H20O4
6'-Demethoxypraecansone B
CAS 93753-26-5C21H20O4
3-(2-Methoxyphenyl)-2-methyl-7-((2-methylallyl)oxy)-4H-chromen-4-one
CAS 610762-24-8C21H20O4
- Oaxacacin88509-90-4C21H20O4
- 1,6-Heptadiene-3,5-dione, 1,7-bis(4-methoxyphenyl)-97432-38-7C21H20O4
- 3-(4-Methoxyphenyl)-7-[(3-methylbut-2-en-1-yl)oxy]-2H-chromen-2-one869079-94-7C21H20O4
- 3-(4-Methoxyphenyl)-4-methyl-7-((2-methylallyl)oxy)-2H-chromen-2-one859132-05-1C21H20O4
- 3-[(3-Methoxybenzyl)oxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one374764-87-1C21H20O4
- Gastrol473231-03-7C21H20O4
- Anhydronotoptol88206-51-3C21H20O4
- Licoagrochalcone B325144-67-0C21H20O4
- 3-Benzyl-4,7-dimethyl-5-(2-oxopropoxy)-2H-chromen-2-one376382-76-2C21H20O4
- 2-[1-(2,6-Dioxocyclohexyl)-3-phenylprop-2-ynyl]cyclohexane-1,3-dione2643341-25-5C21H20O4
- 15-Epi-danshenol-A216987-13-2C21H20O4
- Ethyl 5-methyl-4-[(4-phenylphenoxy)methyl]furan-2-carboxylate419545-30-5C21H20O4
- Emoroidenone169532-89-2C21H20O4
- 3-[4-(Biphenyl-4-yloxymethyl)-5-methyl-furan-2-yl]-propionic acid736182-36-8C21H20O4
- Ovalichromene61670-30-2C21H20O4
- Cedreprenone554408-31-0C21H20O4
- Tephroleocarpin B138590-94-0C21H20O4
- Dibenzyl 2-vinylcyclopropane-1,1-dicarboxylate182740-91-6C21H20O4
- 4-(([1,1'-Biphenyl]-4-yloxy)methyl)-5-isopropylfuran-2-carboxylic acid736182-90-4C21H20O4
- 5-(6,7-Dimethoxy-2,3-dimethylnaphthalen-1-yl)-2H-1,3-benzodioxole129684-11-3C21H20O4
- 2-Propenoic acid, (1-methylethylidene)di-4,1-phenylene ester4491-03-6C21H20O4
- Ethyl 4-[(E)-2-(furan-2-yl)ethenyl]-2-oxo-6-phenylcyclohex-3-ene-1-carboxylate5989-59-3C21H20O4
- 7-(3,3-Dimethyl-2-oxobutoxy)-4-phenyl-2H-chromen-2-one329907-50-8C21H20O4
- 5-Methoxy-8,8-dimethyl-4-phenyl-9,10-dihydro-2H,8H-pyrano[2,3-f]chromen-2-one64620-10-6C21H20O4
- Ethyl 2-methyl-5-{[(2E)-3-phenylprop-2-en-1-yl]oxy}-1-benzofuran-3-carboxylate307552-16-5C21H20O4
- (Z)-2-(3-Methoxybenzylidene)-6-((3-methylbut-2-en-1-yl)oxy)benzofuran-3(2H)-one859139-29-0C21H20O4
- 2-Naphthyl 4,7,7-trimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carboxylate577697-07-5C21H20O4
- (Z)-2-(4-Isopropylbenzylidene)-6-(2-oxopropoxy)benzofuran-3(2H)-one879807-12-2C21H20O4
- (Z)-2-(2-Ethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one623117-45-3C21H20O4
- (Z)-2-(2-Methoxybenzylidene)-6-((3-methylbut-2-en-1-yl)oxy)benzofuran-3(2H)-one858766-91-3C21H20O4
- (Z)-2-(4-Methoxybenzylidene)-6-((3-methylbut-2-en-1-yl)oxy)benzofuran-3(2H)-one858770-02-2C21H20O4
- 3,4,8-Trimethyl-7-[(1-oxo-1-phenylpropan-2-yl)oxy]-2H-chromen-2-one314742-08-0C21H20O4
- 4-Ethyl-7-methyl-5-[(1-oxo-1-phenylpropan-2-yl)oxy]-2H-chromen-2-one314742-56-8C21H20O4
- (Z)-2-(4-Ethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one623117-44-2C21H20O4
- 3-[(2-Methoxybenzyl)oxy]-7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one374764-57-5C21H20O4
- 7-[(2-Methoxybenzyl)oxy]-6-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one374768-65-7C21H20O4
- 8-Methyl-7-(2-oxo-2-phenylethoxy)-4-propyl-2H-chromen-2-one374760-27-7C21H20O4
- 7-[(3-Methoxybenzyl)oxy]-6-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one374767-49-4C21H20O4
- 9-[(3-Methoxybenzyl)oxy]-7-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one374766-44-6C21H20O4
- 7-[(1-Oxo-1-phenylpropan-2-yl)oxy]-4-propyl-2H-chromen-2-one307546-71-0C21H20O4
- Erypoegin B461696-08-2C21H20O4
- Methyl 8-(benzyloxy)-4-(2-hydroxyethyl)-2-naphthoate144003-49-6C21H20O4
- Danshenol C910856-25-6C21H20O4
- Spiro(cyclopropane-1,9'-(9H)fluorene)-2,3-dicarboxylic acid, diethyl ester, cis-41411-72-7C21H20O4
- 2-Methoxy-6-(naphthalen-1-ylmethoxymethyl)-benzoic acid methyl ester1171923-66-2C21H20O4
- 2-Methoxy-6-(naphthalen-2-ylmethoxymethyl)-benzoic acid methyl ester1171923-82-2C21H20O4
- 4-(4-Methoxyphenyl)-7-[(3-methyl-2-butenyl)oxy]-2H-chromen-2-one384360-71-8C21H20O4
- 4-Methyl-7-(2-oxo-2-phenylethoxy)-3-propyl-2H-chromen-2-one314742-76-2C21H20O4
- 9-[(2-Methoxybenzyl)oxy]-7-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one374768-04-4C21H20O4
- 4-(4-Methoxyphenyl)-8-methyl-7-[(2-methylallyl)oxy]-2H-chromen-2-one383891-84-7C21H20O4
- 2-[(4-Ethylphenyl)methylene]-3-oxobenzo[3,4-b]furan-6-yl 2-methylpropanoate622359-55-1C21H20O4
- (2Z)-2-(2-Methylbenzylidene)-3-oxo-2,3-dihydro-1-benzofuran-6-yl 2,2-dimethylpropanoate622360-21-8C21H20O4
- (3E)-3-[(2,3-Dimethoxyphenyl)methylidene]-5-(3,4-dimethylphenyl)furan-2-one333393-94-5C21H20O4
- 4H-1-Benzopyran-6-acetic acid, alpha-ethyl-3-methyl-4-oxo-2-phenyl-, methyl ester173469-71-1C21H20O4
- (2Z)-2-(3-Methylbenzylidene)-3-oxo-2,3-dihydro-1-benzofuran-6-yl 2,2-dimethylpropanoate622360-18-3C21H20O4
- (2Z)-2-(4-Methylbenzylidene)-3-oxo-2,3-dihydro-1-benzofuran-6-yl 2,2-dimethylpropanoate622823-79-4C21H20O4
- DOHA-Fm1040404-88-3C21H20O4
- 1,3-Bis(4-(allyloxy)phenyl)-3-hydroxyprop-2-en-1-one1262142-69-7C21H20O4
- [4-(6-Acetyloxy-3-ethyl-1H-inden-2-yl)phenyl] acetate7478-30-0C21H20O4
- 4-Butyl-7-(2-oxo-2-phenylethoxy)-2H-chromen-2-one376380-94-8C21H20O4
- 3-Benzyl-4-methyl-7-(1-methyl-2-oxopropoxy)-2H-chromen-2-one314742-80-8C21H20O4
- 3-Ethyl-4-methyl-7-(1-methyl-2-oxo-2-phenylethoxy)-2H-chromen-2-one670243-59-1C21H20O4
- 2-Naphthalenecarboxylic acid, 7-methoxy-4-(phenylmethoxy)-, ethyl ester173483-54-0C21H20O4
- 7-Methyl-5-(2-oxo-2-phenylethoxy)-4-propyl-2H-chromen-2-one307546-57-2C21H20O4
- 4-[5-Methoxy-2-(4-methoxybenzyl)phenoxy]phenol679410-96-9C21H20O4
- 4-[5-Methoxy-2-(3-methoxybenzyl)phenoxy]phenol679410-59-4C21H20O4
- 1 suppliers9-Anthracenecarboxylic acid, 2-(1,1-dimethylethoxy)-2-oxoethyl ester594840-62-7C21H20O4
- 4-Oxo-6-(5-phenylpentyl)-4H-1-benzopyran-2-carboxylic acid61270-47-1C21H20O4
- 3,3,3',3'-Tetramethyl-2,2',3,3'-tetrahydro-1,1'-spirobi[indene]-5,5',6,6'-tetraone38475-60-4C21H20O4
- (1E,6E)-1,7-Bis(4-hydroxy-3-methylphenyl)-1,6-heptadiene-3,5-dione1166863-99-5C21H20O4
- 3-Ethyl-4,8-dimethyl-7-(2-oxo-2-phenylethoxy)-2H-chromen-2-one670243-57-9C21H20O4
- 3-Benzyl-4,8-dimethyl-7-(2-oxopropoxy)-2H-chromen-2-one314742-84-2C21H20O4
- 4-(Benzyloxy)-5-methoxy-7-(methoxymethyl)-1-naphthaldehyde253307-93-6C21H20O4
- 4-Oxo-3-(2-oxo-2-phenylethyl)cyclohexyl benzoate52290-94-5C21H20O4
- 3-(1,4-Dimethyl-9,10-dioxo-9,10-dihydroanthracen-2-yl)propyl acetate184872-69-3C21H20O4
- 3-Cyclohexene-1-carboxylic acid, 4-(4-methoxyphenyl)-2-oxo-6-phenyl-, methyl ester, trans-84725-18-8C21H20O4
Frequently asked questions
What is the molar mass of C21H20O4?
The molar mass of C21H20O4 is 336.39 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms and 4 oxygen atoms. The monoisotopic mass is 336.1362 Da.
How many compounds have the formula C21H20O4?
CompoundList lists 115 compounds with the molecular formula C21H20O4, including 4-Methoxylonchocarpin, Danshenol A, 2,2'-(1-Phenylprop-1-yne-3,3-diyl)bis(3-hydroxycyclohex-2-en-1-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 C21H20O4?
C21H20O4 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.