substructure, were isolated from a methanolic extract of the root and the bark of Podocarpus macrophyllus D. DON (Podocarpaceae) with thirteen known bisnor- and norditerpenoids, and the structures of those new bisnor- and norditerpenoids were determined on the basis of their spectroscopic studies. Of the thirteen known ones isolated, the structures of two, i.e., podolactone B and inumakilactone B, were
从罗汉松(Podocarpus macrophyllus D. DON)(罗汉松)的根和树皮的甲醇提取物中分离出十四个具有7alpha:8alpha-epoxy-9,11-enolide亚结构的bisnor-和norterterpene双内酯,makilactones ER,已知有十三种bisnor-和norditerpenoids,以及这些新的bisnor-和norditerpenoids的结构是根据其光谱学研究确定的。在X射线晶体学分析和光谱分析的基础上,对13种已知的分离药物中的两种,即己内酯B和inumakilactone B的结构进行了修改。在这项研究中分离出的许多这类化合物对P388鼠白血病细胞显示出有效的细胞毒活性。