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Flavonoids from genista ephedroides
1Dipartimento di Chimica Bioorganica, Universita di Pisa, via Bonanno 33, 56126 Pisa, Italy, and Istituto di Botanica ed Orto Botanico, Universita di Urbino, via Bramante 28, 61028 Urbino, Italy.
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.