Ombuin

Ombuin
Chemical structure of ombuin
IUPAC name 3,5-dihydroxy-2-(3-hydroxy-4-methoxyphenyl)-7-methoxychromen-4-one
Other names 4',7-Dimethylquercetin 7,4'-Di-O-methylquercetin 4',7-Dimethoxy-3,3',5-trihydroxyflavone
style="background: #F8EABA; text-align: center;" colspan="2" | Identifiers
CAS number	529-40-8
PubChem	5320287
SMILES
style="background: #F8EABA; text-align: center;" colspan="2" | Properties
Molecular formula	C17H14O7
Molar mass	330.29 g/mol
Exact mass	330.073953 u
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Ombuin is an O-methylated flavonol, a type of flavonoid. It is the 4',7-O-methyl derivative of quercetin.

Ombuin can be found in species of the genus Erythroxylum. It can also be synthetized. Ombuin 3-sulfate can be isolated from Flaveria chloraefolia.

Glycosides

Ombuin-3-rutinoside can be isolated from Phytolacca dioica, the ombu tree. Ombuin-3-O-rhamnosylglucoside can be found in Erythroxylum rufum.
Other glycosides (ombuosides) :

• Ombuin 3-galactoside (C₂₃H₂₄O₁₂, CAS number 69168-13-4)
• Ombuin 3-glucoside (C₂₃H₂₄O₁₂, CAS number 158642-42-3)