Two new stilbene glycosides (1 and 2), together with nine known compounds (3-11), were isolated from the water extract of Polygonum multiflorum Thunb. The structures of the new compounds were elucidated by their chemical properties and spectroscopic analyses, including extensive 2D NMR experiments. Compound 2 showed strong DNA cleavage activity, and compounds 1, 2 and 10 (2, 3, 4′, 5-tetrahydroxy-trans -stilbene-2-O-β-D-glucopyranoside) exhibited significant inhibition of lipid peroxidation.
何首乌中新的二苯乙烯甙
肖 凯 宣利江 徐亚明* 白东鲁
（中国科学院上海药物研究所，上海200031）
摘要： 用反相层析法从何首乌(Polygonum multiflorum Thunb.)根茎的水提物中分得2个新的二苯乙烯甙(1、 2)及9个已知化合物:没食子酸(3)、 2,6-二羟基-苯甲酸(4)、吲哚-3-(L-α-氨基-α-羟基-丙酸)甲酯(5)、 1, 2-二羟基丙烷-1-(4-羟基-苯基) (6)、大黄素(7)、大黄素-8-O-β-D-葡萄糖甙(8)、(+)-lyoniresinol-3α-O-β-D-葡萄糖甙(9)、 2, 3, 4′, 5-四羟基反式二苯乙烯-2-O-β-D-吡喃葡萄糖甙(10)和 2, 3, 4′, 5-四羟基反式二苯乙烯-2, 3-二-O-β-D-吡喃葡萄糖甙(11).新化合物结构通过理化性质与波谱分析特别是 2D NMR得以确定.化合物2表现出很强的DNA裂解活性,化合物1、2与10具有很强的抗脂质过氧化活性.
关键词： 何首乌；二苯乙烯甙；DNA裂解活性；抗脂质过氧化活性
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