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 ...
.
Ombuin can be found in species of the genus ''
Erythroxylum
''Erythroxylum'' is a genus of tropical flowering plants in the family Erythroxylaceae. Many of the approximately 200 species contain the tropane alkaloid cocaine,Bieri S, Brachet A, Veuthey J, Christen P. Cocaine distribution in wild Erythroxyl ...
''. It can also be synthesized.
Ombuin 3-sulfate can be isolated from ''
Flaveria chlorifolia''.
Glycosides
Ombuin-3-rutinoside can be isolated from ''
Phytolacca dioica
''Phytolacca dioica'', commonly known as ombú in Spanish and umbu in Portuguese, is a massive evergreen tree in the Pokeweed Family (''Phytolaccaceae'') native to the Pampas of South America. As its specific epithet suggests, it is dioecious, ...
'', the ombu tree.
Ombuin-3-O-rhamnosylglucoside can be found in ''
Erythroxylum rufum''.
[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 (C
23H
24O
12, CAS number 69168-13-4)
*
Ombuin 3-glucoside (C
23H
24O
12, CAS number 158642-42-3)
References
{{flavonol
O-methylated flavonols
Triols