Ombuin

Ombuin

Chemical structure of ombuin
Names
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
Identifiers
CAS Number	529-40-8 Y
ChEBI	CHEBI:67493
ChemSpider	4478412
Jmol 3D model	Interactive image
PubChem	5320287
InChI InChI=1S/C17H14O7/c1-22-9-6-11(19)14-13(7-9)24-17(16(21)15(14)20)8-3-4-12(23-2)10(18)5-8/h3-7,18-19,21H,1-2H3 Key: BWORNNDZQGOKBY-UHFFFAOYSA-N InChI=1/C17H14O7/c1-22-9-6-11(19)14-13(7-9)24-17(16(21)15(14)20)8-3-4-12(23-2)10(18)5-8/h3-7,18-19,21H,1-2H3 Key: BWORNNDZQGOKBY-UHFFFAOYAW
SMILES COC1=C(C=C(C=C1)C2=C(C(=O)C3=C(C=C(C=C3O2)OC)O)O)O
Properties
Chemical formula	C17H14O7
Molar mass	330.29 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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 chlorifolia.

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)