A NEW FLAVONOID GLYCOSIDE FROM MISTLETOE TRANSFORMED BY Rhodobacter sphaeroides

摘要

A new flavonoid glycoside, rhamnazin-3-O-β-D-apiosyl-(1→2)-β-D-[6"-(3-hydroxy-3-methylglutaric methyl ester)]-glucoside (1), was isolated together with seven known flavonoid compounds from mistletoe transformed by Rhodobacter sphaeroides (PSBT). Its structure was elucidated on the basis of MS, 1D, and 2D NMR techniques. All of the eight compounds were subjected to antioxidant activity screening.