Details

Autor(en) / Beteiligte

• Carvalho, Mário G. de
• Suzart, Luciano R.
• Cavatti, Lorena C.
• Kaplan, Maria Auxiliadora C.

Titel

New flavonoids and other constituents from Ouratea hexasperma (Ochnaceae)

Ist Teil von

• Journal of the Brazilian Chemical Society, 2008, Vol.19 (7), p.1423-1428

Ort / Verlag

Sociedade Brasileira de Química

Erscheinungsjahr

2008

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Chromatographical fractionation of the methanol extract from the branches of Ouratea hexasperma (Ochnaceae) afforded two new flavonoids, 7-O-β-D-glucopyranosyl-6-(3-methylbut-2-enyl)-5,4'-dihydroxyflavanonol (6-β,β-dimethylallylaromadendrin-7-O-β-D-glucoside) and 7-O-β-D-glucopyranosyl-6-(3-methylbut-2-enyl)-3,5,4'-trihydroxyflavone (6-β,β-dimethylallylkaempferol-7-O-β-D-glucoside) besides a mixture of sitosterol and stigmasterol,lupeol, sitosterol-3-O-β-D-glycopyranoside and 2,4-dihydroxyphenylacetic acid. The structures were established by analysis of IR, ESI-MS, and NMR spectra of the natural substances, and those of the dimethyl ether and peracetyl-derivatives of the new flavone, as well as comparison with literature values.