Ombuin is an

O-methylated flavonol The O-methylated flavonoids or methoxyflavonoids are flavonoids with methylations on hydroxyl groups (methoxy bonds). O-methylation has an effect on the solubility of flavonoids. Enzymes O-methylated flavonoids formation implies the presence of spe ...

, a type of flavonoid. It is the 4',7-O-methyl derivative of

quercetin Quercetin is a plant flavonol from the flavonoid group of polyphenols. It is found in many fruits, vegetables, leaves, seeds, and grains; capers, red onions, and kale are common foods containing appreciable amounts of it. It has a bitter flavor a ...

. Ombuin can be found in species of the genus ''

Erythroxylum ''Erythroxylum'' (''Erythroxylon'') is a genus of tropical flowering plants in the family Erythroxylaceae. Many of the approximately 200 species contain the substance cocaine,Bieri S, Brachet A, Veuthey J, Christen P. Cocaine distribution in wild ...

''. It can also be synthesized.

Ombuin 3-sulfate 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 synthesized. Ombuin 3-sulfate can be isolated from '' Flaveri ...

can be isolated from '' Flaveria chlorifolia''.

Glycosides

Ombuin-3-rutinoside can be isolated from ''

Phytolacca dioica ''Phytolacca dioica'', commonly known as ombú, is a massive evergreen tree native to the Pampa of Argentina. As its specific epithet suggests, it is dioecious, with male and female flowers on separate plants. It has an umbrella-like canopy t ...

'', the ombu tree. Ombuin-3-O-rhamnosylglucoside can be found in ''

Erythroxylum rufum ''Erythroxylum rufum'', the rufous false coca, is a flowering plant species in the genus ''Erythroxylum ''Erythroxylum'' (''Erythroxylon'') is a genus of tropical flowering plants in the family Erythroxylaceae. Many of the approximately 200 s ...

''.Flavonoids of Erythroxylum rufum and Erythroxylum ulei. Bruce A. Bohm, David W. Phillips and Fred R. Gander, J. Nat. Prod., 1981, volume 44, issue 6, pages 676–679,
Other glycosides ( ombuosides) : *

Ombuin 3-galactoside 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 synthesized. Ombuin 3-sulfate can be isolated from '' Flaveri ...

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

References

{{flavonol O-methylated flavonols