以1-丁基-3-甲基咪唑四氟硼酸盐([Bmim]BF4)离子液体取代天然产物研究中的溶剂,对具有抗雄性生育活性和抑菌作用的鹿藿根中的异黄酮成分进行提取和分离.从鹿藿根的70%乙醇粗提物中,成功分离纯化得到3种异黄酮类化合物,它们均是首次从植物鹿藿中分离得到.经过波谱分析鉴定,3种化合物的结构被确定为木豆酮(Cajanone)、鸡豆黄素A(Biochanin A)和1种新的异黄酮类化合物,被命名为3-[4'-(1"-甲氧基)-丙基氧代]-苯基-5,7-二羟基异黄酮(3-[4'-(1"-methoxy)-propoxy]-phenyl-5,7-dihydroxy-isoflavone).建立了植物鹿藿中异黄酮含量的测定方法:以木豆酮化合物为标准品,在其紫外最大吸收峰270 nm处,测得生药中总异黄酮的含量为0.73%;测得平均加样回收率99.94%,相对标准偏差3.66%,离子液体回收率76.7%.
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