Flavonoids from Genista ephedroides

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Abstract
Three new flavonoids (1−3) and 11 known compounds (genistein, isoprunetin, wighteone, laburnetin, alpinumisoflavone, genistin, genistein 8-C-glucoside, apigenin, isokaempferide, licoflavone C, and d-pinitol) were isolated from the aerial parts of Genista ephedroides. The structures of the new compounds were established as hydroxyalpinumisoflavone (1) [4‘,5-dihydroxy-2‘‘-methyl-2‘‘-hydroxymethylpyrano(5‘‘,6‘‘:6,7)isoflavone], ephedroidin (2) [4‘,5,7-trihydroxy-8-(2-hydroxy-3-methyl-3-butenyl)flavone], and genisteone (3) (7-O-glucosylwighteone) by means of spectroscopic methods.

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