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 1 to 100 of 166 compounds
1,7-Bis(4-hydroxy-3-methoxyphenyl)-1,4,6-heptatrien-3-one
CAS 470466-02-5C21H20O5
(1,1'-Biphenyl)-4-carboxylic acid, (3aR,4S,5R,6aS)-hexahydro-4-(hydroxymethyl)-2-oxo-2H-cyclopenta(b)furan-5-yl ester
CAS 31752-99-5C21H20O5
Xanthohumol C
CAS 189299-05-6C21H20O5
3-(2,3-Dihydro-1,4-benzodioxin-6-yl)-7-ethoxy-2,8-dimethyl-4H-chromen-4-one
CAS 202914-38-3C21H20O5
![4-(Hydroxymethyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl [1,1'-biphenyl]-4-carboxylate chemical structure, C21H20O5, CAS 39265-57-1](/s/SZJVIFMPKWMGSX-OKYOBFRVSA-N.svg)
4-(Hydroxymethyl)-2-oxohexahydro-2H-cyclopenta[b]furan-5-yl [1,1'-biphenyl]-4-carboxylate
CAS 39265-57-1C21H20O5
![Methyl 4-{[(2-oxo-4-propyl-2H-chromen-7-yl)oxy]methyl}benzoate chemical structure, C21H20O5, CAS 307546-86-7](/s/YPFSPQWLFRZWMS-UHFFFAOYSA-N.svg)
Methyl 4-{[(2-oxo-4-propyl-2H-chromen-7-yl)oxy]methyl}benzoate
CAS 307546-86-7C21H20O5
![[4-(Hydroxymethyl)-2-oxo-3,3a,4,5,6,6a-hexahydrocyclopenta[b]furan-5-yl] 4-phenylbenzoate chemical structure, C21H20O5, CAS 54382-73-9](/s/SZJVIFMPKWMGSX-UHFFFAOYSA-N.svg)
[4-(Hydroxymethyl)-2-oxo-3,3a,4,5,6,6a-hexahydrocyclopenta[b]furan-5-yl] 4-phenylbenzoate
CAS 54382-73-9C21H20O5
3-(3,4-Dihydro-2H-1,5-benzodioxepin-7-yl)-7-ethoxy-2-methyl-4H-chromen-4-one
CAS 302939-34-0C21H20O5
Gancaonin G
CAS 126716-34-5C21H20O5
![(2Z,5Z)-2,5-Bis[(4-hydroxy-3-methoxyphenyl)methylidene]cyclopentan-1-one chemical structure, C21H20O5, CAS 1321666-35-6](/s/NZSRSKNDCCSSGY-VULZFCBJSA-N.svg)
(2Z,5Z)-2,5-Bis[(4-hydroxy-3-methoxyphenyl)methylidene]cyclopentan-1-one
CAS 1321666-35-6C21H20O5
![(2E,5E)-2,5-Bis[(4-hydroxy-3-methoxyphenyl)methylidene]cyclopentan-1-one chemical structure, C21H20O5, CAS 7249-34-5](/s/NZSRSKNDCCSSGY-KAVGSWPWSA-N.svg)
(2E,5E)-2,5-Bis[(4-hydroxy-3-methoxyphenyl)methylidene]cyclopentan-1-one
CAS 7249-34-5C21H20O5
4-(4-Methoxyphenyl)-8-methyl-7-(3-oxobutan-2-yloxy)chromen-2-one
CAS 376382-87-5C21H20O5
Isopropyl 2-methyl-5-((2-methylbenzoyl)oxy)benzofuran-3-carboxylate
CAS 307551-67-3C21H20O5
![5-{4-[4-(Prop-2-yn-1-yloxy)benzoyl]phenoxy}pentanoic acid chemical structure, C21H20O5, CAS 2140866-79-9](/s/PVDBYWSDYKTIBJ-UHFFFAOYSA-N.svg)
5-{4-[4-(Prop-2-yn-1-yloxy)benzoyl]phenoxy}pentanoic acid
CAS 2140866-79-9C21H20O5
Gancaonin A
CAS 27762-99-8C21H20O5
Erypoegin F
CAS 586961-23-1C21H20O5
![3-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-7-isopropoxy-2-methyl-4H-chromen-4-one chemical structure, C21H20O5, CAS 202843-20-7](/s/HNZXMODDPFLALH-UHFFFAOYSA-N.svg)
3-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-7-isopropoxy-2-methyl-4H-chromen-4-one
CAS 202843-20-7C21H20O5
Glyurallin A
CAS 199331-36-7C21H20O5
Erylatissin A
CAS 847976-81-2C21H20O5
Artonol A
CAS 186824-57-7C21H20O5
Vismiaquinone
CAS 73340-48-4C21H20O5
(4-(2-Methoxy-4-(2-methylprop-2-enoyloxy)phenyl)phenyl) 2-methylprop-2-enoate
CAS 1882074-17-0C21H20O5
Propan-2-yl 2-(2-oxo-4-phenylchromen-7-yl)oxypropanoate
CAS 370582-87-9C21H20O5
Edunol
CAS 37706-60-8C21H20O5
- Butyl [(2-oxo-4-phenyl-2H-chromen-7-yl)oxy]acetate302939-33-9C21H20O5
- 6,7,8,9-Tetrahydrodibenzofuran-2-yl 3,4-dimethoxybenzoate622792-76-1C21H20O5
- Daldinone D923955-10-6C21H20O5
- 3-(4-Ethylphenoxy)-4-oxo-4H-chromen-7-yl 2-methylpropanoate433307-08-5C21H20O5
- 3H,7H-Furo(3,2-c:5,4-f')bis(1)benzopyran-10-ol, 6b,12b-dihydro-12-methoxy-3,3-dimethyl-, (6bR,12bR)-157226-48-7C21H20O5
- 3-(2-Methoxyphenyl)-4-oxo-4H-chromen-7-yl 2,2-dimethylpropanoate303121-59-7C21H20O5
- tert-Butyl 2-(4-oxo-3-phenylchromen-7-yl)oxyacetate449739-34-8C21H20O5
- 3-(4-Methoxyphenyl)-4-oxo-4H-chromen-7-yl pivalate444643-83-8C21H20O5
- tert-Butyl 2-[(2-oxo-3-phenyl-2H-chromen-7-yl)oxy]acetate869080-45-5C21H20O5
- Benzyl [(2-oxo-4-propyl-2H-chromen-7-yl)oxy]acetate307546-65-2C21H20O5
- Gancaonin M129145-51-3C21H20O5
- 3-(1,3-Benzodioxol-5-yl)-7-methoxy-2-methyl-6-propyl-4H-chromen-4-one170241-52-8C21H20O5
- 3-(2,3-Dihydro-1,4-benzodioxin-6-yl)-6-ethyl-7-methoxy-2-methylchromen-4-one170511-34-9C21H20O5
- Ethyl 5-[(2-methylpropanoyl)oxy]-2-phenyl-1-benzofuran-3-carboxylate300587-08-0C21H20O5
- 3-(2,4-Dimethoxyphenyl)-7-((2-methylallyl)oxy)-2H-chromen-2-one864751-91-7C21H20O5
- 3-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-2,6-diethyl-7-hydroxy-4H-chromen-4-one159647-63-9C21H20O5
- Isopropyl 2-((4-methyl-2-oxo-3-phenyl-2H-chromen-7-yl)oxy)acetate5614-84-6C21H20O5
- Ethyl 2-[(4-methyl-2-oxo-3-phenyl-2H-chromen-7-yl)oxy]propanoate869080-89-7C21H20O5
- 3-(Benzo[d][1,3]dioxol-5-yl)-6-ethyl-7-isopropoxy-4H-chromen-4-one202843-13-8C21H20O5
- 3-(2-Ethoxyphenoxy)-7-((2-methylallyl)oxy)-4H-chromen-4-one724740-69-6C21H20O5
- 3-(2-Methoxyphenoxy)-7-((3-methylbut-2-en-1-yl)oxy)-4H-chromen-4-one637750-54-0C21H20O5
- 3-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-6-ethyl-7-methoxy-4H-chromen-4-one610754-41-1C21H20O5
- 3-(2,3-Dihydrobenzo[b][1,4]dioxin-6-yl)-7-ethoxy-6-ethyl-4H-chromen-4-one610762-12-4C21H20O5
- 3-(4-Methoxyphenoxy)-2-methyl-7-((2-methylallyl)oxy)-4H-chromen-4-one858756-76-0C21H20O5
- 3-(2-Methoxyphenoxy)-2-methyl-7-((2-methylallyl)oxy)-4H-chromen-4-one859139-11-0C21H20O5
- 3-(4-Methoxyphenyl)-4-methyl-2-oxo-2H-chromen-6-yl 2-methylpropanoate869341-74-2C21H20O5
- 1 suppliers(l)-Edunol33909-74-9C21H20O5
- 3-(3,4-Dimethoxyphenyl)-7-[(2-methylprop-2-en-1-yl)oxy]-2H-chromen-2-one869080-06-8C21H20O5
- 3-(2,5-Dimethoxyphenyl)-7-((2-methylallyl)oxy)-2H-chromen-2-one864751-20-2C21H20O5
- Neorauflavene53734-75-1C21H20O5
- 3-(4-Methoxyphenyl)-4-methyl-2-oxo-2H-chromen-7-yl 2-methylpropanoate869080-19-3C21H20O5
- (+)-Tephrosone93753-30-1C21H20O5
- Ethyl 2-[(8-methyl-2-oxo-4-phenyl-2H-chromen-7-yl)oxy]propanoate307547-36-0C21H20O5
- 3-(3-Methoxyphenoxy)-2-methyl-7-((2-methylallyl)oxy)-4H-chromen-4-one637749-35-0C21H20O5
- Lansiumarin A205115-73-7C21H20O5
- Piloquinone25414-26-0C21H20O5
- Zygolone A1039082-00-2C21H20O5
- {4,8-Dimethyl-7-[(3-methylbenzyl)oxy]-2-oxo-2H-chromen-3-yl}acetic acid858753-48-7C21H20O5
- Artonin U123549-17-7C21H20O5
- Ethyl 7-(benzyloxy)-6-ethyl-4-oxo-4H-chromene-2-carboxylate6345-77-3C21H20O5
- 3-[7-(Benzyloxy)-4,8-dimethyl-2-oxo-2H-chromen-3-yl]propanoic acid858748-43-3C21H20O5
- 5-O-Methyllupiwighteone104703-98-2C21H20O5
- Citrunobin126026-23-1C21H20O5
- 2-[(3-Benzyl-4,7-dimethyl-2-oxo-2H-chromen-5-yl)oxy]propanoic acid428845-94-7C21H20O5
- Isozygolone A1039082-04-6C21H20O5
- 7-Prenyloxy-3'-hydroxy-4'-methoxyisoflavone82345-38-8C21H20O5
- Ovaliflavanone C75680-31-8C21H20O5
- Propan-2-yl 2-methyl-5-(2-oxo-2-phenylethoxy)-1-benzofuran-3-carboxylate300557-17-9C21H20O5
- Demethylpraecanson B74517-66-1C21H20O5
- (Z)-2-(2-Methoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl pivalate622824-03-7C21H20O5
- Isopropyl ((7-methyl-2-oxo-4-phenyl-2H-chromen-5-yl)oxy)acetate307548-15-8C21H20O5
- 4-(7-Hydroxy-4-oxo-4H-1-benzopyran-3-yl)phenyl hexanoate602329-51-1C21H20O5
- 1H,7H-(1,3)Dioxolo(5,6)benzofuro(3,2-c)pyrano(3,2-g)(1)benzopyran, 2,3,7a,13a-tetrahydro-3,3-dimethyl-, (7aR,13aR)-36284-97-6C21H20O5
- (Z)-2-(3-Methoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl pivalate622824-50-4C21H20O5
- Propan-2-yl 2-methyl-5-(4-methylbenzoyl)oxy-1-benzofuran-3-carboxylate300557-44-2C21H20O5
- tert-Butyl 2-[(2-oxo-4-phenyl-2H-chromen-7-yl)oxy]acetate314742-89-7C21H20O5
- (Z)-2-(2,3-Dimethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one620547-37-7C21H20O5
- Ethyl 2-[(3-benzyl-4-methyl-2-oxo-2H-chromen-7-yl)oxy]acetate6021-27-8C21H20O5
- Ethyl 2-[(7-methyl-2-oxo-4-phenyl-2H-chromen-5-yl)oxy]propanoate305863-04-1C21H20O5
- Methyl 2-(3-benzyl-4,8-dimethyl-2-oxochromen-7-yl)oxyacetate374763-11-8C21H20O5
- Isopropyl ((8-methyl-2-oxo-4-phenyl-2H-chromen-7-yl)oxy)acetate307547-32-6C21H20O5
- (Z)-2-(4-Methoxybenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl pivalate622824-46-8C21H20O5
- (Z)-tert-Butyl 2-((2-benzylidene-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)acetate623117-79-3C21H20O5
- (Z)-Ethyl 2-((2-(4-ethylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)acetate620547-79-7C21H20O5
- (Z)-Ethyl 2-((2-(3-methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)propanoate620546-59-0C21H20O5
- (Z)-Ethyl 2-((2-(2-methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)propanoate620546-60-3C21H20O5
- (Z)-Ethyl 2-((2-(4-methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)propanoate623122-90-7C21H20O5
- (Z)-Methyl 2-((2-(4-ethylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)propanoate620546-38-5C21H20O5
- (Z)-Isopropyl 2-((2-(3-methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)acetate622805-68-9C21H20O5
- (Z)-Isopropyl 2-((2-(4-methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)acetate623121-48-2C21H20O5
- 3-(4-Butoxybenzoyl)-8-methoxy-2H-chromen-2-one1351398-20-3C21H20O5
- 7-[2-(4-Methoxyphenyl)-2-oxoethoxy]-4-propylchromen-2-one374760-10-8C21H20O5
- (Z)-2-(3,4-Dimethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one858757-94-5C21H20O5
- (Z)-Isopropyl 2-((2-(2-methylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)acetate622805-76-9C21H20O5
- (Z)-2-(2,5-Dimethoxybenzylidene)-6-((2-methylallyl)oxy)benzofuran-3(2H)-one858764-63-3C21H20O5
- (Z)-Methyl 2-((2-(4-isopropylbenzylidene)-3-oxo-2,3-dihydrobenzofuran-6-yl)oxy)acetate858764-52-0C21H20O5
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 1,7-Bis(4-hydroxy-3-methoxyphenyl)-1,4,6-heptatrien-3-one, (1,1'-Biphenyl)-4-carboxylic acid, (3aR,4S,5R,6aS)-hexahydro-4-(hydroxymethyl)-2-oxo-2H-cyclopenta(b)furan-5-yl ester, Xanthohumol C. 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.