Molecular formula
C21H20O5
166 compounds have this formula on CompoundList.
- Molar mass
- 352.39g/mol
- Monoisotopic mass
- 352.1311Da
- Atoms
- 46
- Elements
- 3
- Rings plus double bonds
- 12
The formula C21H20O5 describes a molecule made of 21 carbon atoms, 20 hydrogen atoms 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 × 2171.58%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 205.72%1.008 × 20 = 20.160 g/mol
- O Oxygen × 522.70%15.999 × 5 = 79.995 g/mol
Look up another formula
Compounds with the formula C21H20O5
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 101 to 166 of 166 compounds
(Z)-2-(2,4-Dimethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one
CAS 858770-42-0C21H20O5
![3-[(3,4-Dimethoxyphenyl)methylene]-5-(4-ethoxyphenyl)furan-2-one chemical structure, C21H20O5, CAS 404846-09-9](/s/QFZULZZOYFRRQW-WJDWOHSUSA-N.svg)
3-[(3,4-Dimethoxyphenyl)methylene]-5-(4-ethoxyphenyl)furan-2-one
CAS 404846-09-9C21H20O5
(Z)-2-(4-Ethoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl isobutyrate
CAS 622823-70-5C21H20O5
(Z)-2-(2-Ethoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl isobutyrate
CAS 622823-74-9C21H20O5
![[4-(7-Acetyloxy-2-ethyl-2H-chromen-3-yl)phenyl] acetate chemical structure, C21H20O5, CAS 10499-09-9](/s/GXYODSQQOXOLLH-UHFFFAOYSA-N.svg)
[4-(7-Acetyloxy-2-ethyl-2H-chromen-3-yl)phenyl] acetate
CAS 10499-09-9C21H20O5
![4-Ethyl-7-[2-(4-methoxyphenyl)-2-oxoethoxy]-8-methyl-2H-chromen-2-one chemical structure, C21H20O5, CAS 374765-50-1](/s/WUTQJQWTUMAIGU-UHFFFAOYSA-N.svg)
4-Ethyl-7-[2-(4-methoxyphenyl)-2-oxoethoxy]-8-methyl-2H-chromen-2-one
CAS 374765-50-1C21H20O5
![{4,8-Dimethyl-7-[(2-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}acetic acid chemical structure, C21H20O5, CAS 858754-76-4](/s/OVRUDNWWZORPPX-UHFFFAOYSA-N.svg)
{4,8-Dimethyl-7-[(2-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}acetic acid
CAS 858754-76-4C21H20O5
(Z)-2-((5-Methylfuran-2-yl)methylene)-3-oxo-2,3-dihydrobenzofuran-6-yl cyclohexanecarboxylate
CAS 622791-82-6C21H20O5
![Methyl 4-{[(3,4,8-trimethyl-2-oxo-2H-chromen-7-yl)oxy]methyl}benzoate chemical structure, C21H20O5, CAS 374758-59-5](/s/ODNMWIRKOXWBTE-UHFFFAOYSA-N.svg)
Methyl 4-{[(3,4,8-trimethyl-2-oxo-2H-chromen-7-yl)oxy]methyl}benzoate
CAS 374758-59-5C21H20O5
2-((3-Benzyl-4,8-dimethyl-2-oxo-2H-chromen-7-yl)oxy)propanoic acid
CAS 374711-15-6C21H20O5
![Methyl phenyl[(3,4,7-trimethyl-2-oxo-2H-chromen-5-yl)oxy]acetate chemical structure, C21H20O5, CAS 670243-43-3](/s/AWAJDWSBAZMYBA-UHFFFAOYSA-N.svg)
Methyl phenyl[(3,4,7-trimethyl-2-oxo-2H-chromen-5-yl)oxy]acetate
CAS 670243-43-3C21H20O5
Oxolan-2-ylmethyl 5-(naphthalen-2-yloxymethyl)furan-2-carboxylate
CAS 438465-68-0C21H20O5
2,6-Bis(2,4-dihydroxybenzyl)-4-methylphenol
CAS 93933-64-3C21H20O5
![7-[2-(4-Methoxyphenyl)-2-oxoethoxy]-3,4,8-trimethyl-2H-chromen-2-one chemical structure, C21H20O5, CAS 374710-39-1](/s/MGSCXSDBPYLQQQ-UHFFFAOYSA-N.svg)
7-[2-(4-Methoxyphenyl)-2-oxoethoxy]-3,4,8-trimethyl-2H-chromen-2-one
CAS 374710-39-1C21H20O5
![4-Ethylphenyl 5-[(2-methoxyphenoxy)methyl]-2-furoate chemical structure, C21H20O5, CAS 445231-58-3](/s/VYSAPIADDUSASG-UHFFFAOYSA-N.svg)
4-Ethylphenyl 5-[(2-methoxyphenoxy)methyl]-2-furoate
CAS 445231-58-3C21H20O5
![[2-Methyl-4-oxo-3-(4-propylphenoxy)chromen-7-yl] acetate chemical structure, C21H20O5, CAS 5358-65-6](/s/BTKVNOZNOYURBA-UHFFFAOYSA-N.svg)
[2-Methyl-4-oxo-3-(4-propylphenoxy)chromen-7-yl] acetate
CAS 5358-65-6C21H20O5
![3-{4-Methyl-7-[(3-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}propanoic acid chemical structure, C21H20O5, CAS 858750-13-7](/s/URRJQTBXKJVPNP-UHFFFAOYSA-N.svg)
3-{4-Methyl-7-[(3-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}propanoic acid
CAS 858750-13-7C21H20O5
![{7-[(2,5-Dimethylbenzyl)oxy]-4-methyl-2-oxo-2H-chromen-3-yl}acetic acid chemical structure, C21H20O5, CAS 858753-46-5](/s/SZJIKNXDQLUZOC-UHFFFAOYSA-N.svg)
{7-[(2,5-Dimethylbenzyl)oxy]-4-methyl-2-oxo-2H-chromen-3-yl}acetic acid
CAS 858753-46-5C21H20O5
![{7-[(3,5-Dimethylbenzyl)oxy]-4-methyl-2-oxo-2H-chromen-3-yl}acetic acid chemical structure, C21H20O5, CAS 858745-25-2](/s/JIFWKYFOJRYKLL-UHFFFAOYSA-N.svg)
{7-[(3,5-Dimethylbenzyl)oxy]-4-methyl-2-oxo-2H-chromen-3-yl}acetic acid
CAS 858745-25-2C21H20O5
![Methyl 4-{[(4-ethyl-8-methyl-2-oxo-2H-chromen-7-yl)oxy]methyl}benzoate chemical structure, C21H20O5, CAS 380474-50-0](/s/VQELCXCKEVXFHP-UHFFFAOYSA-N.svg)
Methyl 4-{[(4-ethyl-8-methyl-2-oxo-2H-chromen-7-yl)oxy]methyl}benzoate
CAS 380474-50-0C21H20O5
![Ethyl 2-[(2-oxo-4-phenyl-2H-chromen-7-yl)oxy]butanoate chemical structure, C21H20O5, CAS 374704-01-5](/s/OVIQADPZIJPFLH-UHFFFAOYSA-N.svg)
Ethyl 2-[(2-oxo-4-phenyl-2H-chromen-7-yl)oxy]butanoate
CAS 374704-01-5C21H20O5
Ethyl 2-(3,4-dimethyl-2-oxochromen-7-yl)oxy-2-phenylacetate
CAS 500204-08-0C21H20O5
![(3AR,4R,5R,6aS)-4-(hydroxymethyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl [1,1'-biphenyl]-4-carboxylate chemical structure, C21H20O5, CAS 2218532-68-2](/s/SZJVIFMPKWMGSX-YDZRNGNQSA-N.svg)
(3AR,4R,5R,6aS)-4-(hydroxymethyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl [1,1'-biphenyl]-4-carboxylate
CAS 2218532-68-2C21H20O5
![2-[(3,4-Diethoxyphenyl)-hydroxymethyl]naphthalene-1,4-dione chemical structure, C21H20O5, CAS 7153-92-6](/s/KXPJCUKQZUTCQO-UHFFFAOYSA-N.svg)
2-[(3,4-Diethoxyphenyl)-hydroxymethyl]naphthalene-1,4-dione
CAS 7153-92-6C21H20O5
- 4-Ethyl-5-[2-(3-methoxyphenyl)-2-oxoethoxy]-7-methyl-2H-chromen-2-one690678-04-7C21H20O5
- 4-Ethyl-7-[2-(3-methoxyphenyl)-2-oxoethoxy]-8-methyl-2H-chromen-2-one690680-29-6C21H20O5
- Methyl {4-methyl-7-[(4-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}acetate670245-36-0C21H20O5
- 6-Ethyl-7-[2-(4-methoxyphenyl)-2-oxoethoxy]-4-methyl-2H-chromen-2-one670243-54-6C21H20O5
- 8-Methoxy-4-methyl-3-(2-oxocyclohexyl)oxybenzo[c]chromen-6-one670245-27-9C21H20O5
- 4H-1-Benzopyran-6-acetic acid, alpha-ethyl-3-methoxy-4-oxo-2-phenyl-, methyl ester173469-83-5C21H20O5
- Methyl 2-(2-oxo-4-propylchromen-7-yl)oxy-2-phenylacetate670243-21-7C21H20O5
- 4-[3-(1,3-Benzodioxol-5-yl)acryloyl]phenyl pivalate306730-22-3C21H20O5
- 1,3-Dioxane-4,6-dione, 2,2-dimethyl-5-(3-oxo-1,3-diphenylpropyl)-89002-76-6C21H20O5
- Methyl 4-{[(4-ethyl-7-methyl-2-oxo-2H-chromen-5-yl)oxy]methyl}benzoate690682-71-4C21H20O5
- 3-{4-Methyl-7-[(4-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}propanoic acid858757-02-5C21H20O5
- 3-{4-Methyl-7-[(2-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}propanoic acid858759-28-1C21H20O5
- [(8-Methyl-2-oxo-4-propyl-2H-chromen-7-yl)oxy](phenyl)acetic acid500204-26-2C21H20O5
- 4-Oxo-7-[(5-phenylpentyl)oxy]-4H-1-benzopyran-2-carboxylic acid61270-51-7C21H20O5
- 2-Naphthalenecarboxylic acid, 4,7-dimethoxy-6-(phenylmethoxy)-, methyl ester94875-72-6C21H20O5
- Ethyl 2-[5-methoxy-1-(4-methoxyphenyl)-3-oxoinden-2-yl]acetate81756-94-7C21H20O5
- 3-Ethyl-7-[2-(3-methoxyphenyl)-2-oxoethoxy]-4-methyl-2H-chromen-2-one670245-80-4C21H20O5
- Methyl 4-{[(3,4,7-trimethyl-2-oxo-2H-chromen-5-yl)oxy]methyl}benzoate690682-72-5C21H20O5
- 4-Butyl-2-oxo-2H-chromen-7-yl 3-methoxybenzoate670244-95-8C21H20O5
- 5-[2-(3-Methoxyphenyl)-2-oxoethoxy]-3,4,7-trimethyl-2H-chromen-2-one670245-89-3C21H20O5
- 7-[2-(3-Methoxyphenyl)-2-oxoethoxy]-4-propyl-2H-chromen-2-one670245-83-7C21H20O5
- 7-[2-(3-Methoxyphenyl)-2-oxoethoxy]-3,4,8-trimethyl-2H-chromen-2-one670245-76-8C21H20O5
- 5-[2-(4-Methoxyphenyl)-2-oxoethoxy]-3,4,7-trimethyl-2H-chromen-2-one670244-16-3C21H20O5
- Methyl phenyl[(3,4,8-trimethyl-2-oxo-2H-chromen-7-yl)oxy]acetate670243-47-7C21H20O5
- 3-Ethyl-7-[2-(4-methoxyphenyl)-2-oxoethoxy]-4-methyl-2H-chromen-2-one670243-97-7C21H20O5
- 2-Naphthalenecarboxylic acid, 5,7-dimethoxy-4-(phenylmethoxy)-, methyl ester879885-56-0C21H20O5
- [4-(2-Ethyl-1-benzofuran-3-carbonyl)-2,6-dimethylphenoxy]acetic acid91627-68-8C21H20O5
- 2-Naphthalenecarboxylic acid, 4,6-dimethoxy-7-(phenylmethoxy)-, methyl ester75628-94-3C21H20O5
- Methyl 6-hydroxy-5-(6-hydroxy-3-methoxy-2,4-dimethylphenyl)-2-naphthoate1832513-71-9C21H20O5
- 3-(4-Butoxybenzoyl)-7-methoxy-2H-chromen-2-one2549002-25-5C21H20O5
- 4-Butyl-2-oxo-2H-chromen-7-yl 4-methoxybenzoate670242-95-2C21H20O5
- 8-Methyl-2-oxo-4-propyl-2H-chromen-7-yl 3-methoxybenzoate670244-94-7C21H20O5
- 8-Methyl-2-oxo-4-propyl-2H-chromen-7-yl 4-methoxybenzoate670243-39-7C21H20O5
- Methyl 2-[(4-ethyl-8-methyl-2-oxo-2H-chromen-7-yl)oxy]-2-phenylacetate670243-19-3C21H20O5
- 5-Methyl-2-(propan-2-yl)phenyl 7-methoxy-2-oxo-2H-1-benzopyran-3-carboxylate7047-34-9C21H20O5
- 1,3-Bis{4-[(oxiran-2-yl)methoxy]phenyl}prop-2-en-1-one69925-44-6C21H20O5
- 1-(6-Ethoxy-4,7-dimethoxy-1-benzofuran-5-yl)-3-phenylprop-2-en-1-one62062-06-0C21H20O5
- 2,4-Bis[(2-hydroxyphenyl)methyl]-5-methoxybenzene-1,3-diol61463-13-6C21H20O5
- 2,5-Bis[(2-hydroxy-5-methoxyphenyl)methylidene]cyclopentan-1-one61390-27-0C21H20O5
- 2,5-Bis[(3-hydroxy-4-methoxyphenyl)methylidene]cyclopentan-1-one61390-25-8C21H20O5
- 5-(Benzyloxy)-4,7,8-trimethoxynaphthalene-2-carbaldehyde828940-60-9C21H20O5
- Ethyl (E)-3-(2-(benzofuran-2-yl)-4,5-dimethoxyphenyl)acrylate2096416-26-9C21H20O5
Frequently asked questions
What is the molar mass of C21H20O5?
The molar mass of C21H20O5 is 352.39 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms and 5 oxygen atoms. The monoisotopic mass is 352.1311 Da.
How many compounds have the formula C21H20O5?
CompoundList lists 166 compounds with the molecular formula C21H20O5, including (Z)-2-(2,4-Dimethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one, 3-[(3,4-Dimethoxyphenyl)methylene]-5-(4-ethoxyphenyl)furan-2-one, (Z)-2-(4-Ethoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl isobutyrate. 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 C21H20O5?
C21H20O5 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.