were also isolated. The structures of triterpene glucosides was elucidated with extensive investigation by one and two dimensional NMR spectroscopy and the structures were confirmed by partial enzymatic hydrolyses to give the corresponding mono-glucosides and aglycones. The structures of the megastigmanes, including their absolute stereochemistries, were elucidated by spectroscopic evidence and by the
用色谱技术分离海产柿(Diospyros maritima)的
甲醇(MeOH)
提取物中的1-BuOH可溶级分,得到三种新的齐墩果烷型和一种新的乌烷型三萜
葡糖苷,称为依贝那马里糖苷AD(1-4);两个megastigmanes也被隔离。通过一维和二维NMR光谱对三萜糖苷的结构进行了广泛研究,并通过部分酶
水解证实了结构,从而给出了相应的
单糖苷和糖苷配基。巨型柱头的结构,包括其绝对的立体
化学,已通过光谱学证据和改进的Mosher方法得以阐明。两个megastigmanes
化学相关联,并明确确定其绝对结构。测定了三萜糖苷及其降解产物的细胞毒性。他们没有显示任何重要活动。