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Saikosaponin q-1 from Bupleurum chinense


A new saikosaponin was isolated from Bupleurum chinense DC., and its structure was identified as 3β,16α,23,28,30-pentahydroxy-olean-11,13(18)-dien-3-O-β-D-glucopyranosyl(1→6)-[α-L-rhamnopyranosyl (1→4)]-β-D-glucopyranoside on the basis of chemical and spectral evidence, named as saikosaponin q-1. In addition, two known saikosaponins, 3″-O-acetyl-saikosaponin d and 3″-O-acetyl-saikosaponin b2, were also isolated and identified from this plant for the first time.

新化合物柴胡皂甙q-1 的结构鉴定
梁鸿1韩紫岩1 赵玉英1*王邠1 崔育新1杨文修2 余奕2

(1. 北京大学药学院,北京100083;2.  南开大学生物物理与技术系,天津300071)

摘要:从北柴胡(Bupheurum chinense DC.)根的醇提液的正丁醇部分分离得到3个化合物,分别鉴定为柴胡皂甙q-1(1)、3″-O-乙酰柴胡皂甙d(2)和3″-O-乙酰柴胡皂甙b2(3).化合物1为新化合物,用化学和波谱法确定其结构为3β,16α,23,28,30-五羟基-齐墩果-11,13(18)-二烯-3-O-β-D吡喃葡萄糖(1→6)-[α-L-吡喃鼠李糖基(1→4)]-β-D-吡喃葡萄糖甙。化合物2和3为首次从北柴胡中分离得到。
关键词: 北柴胡;柴胡皂甙q-1


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