内折香茶菜乙素的化学结构

Chemical Structure of Inflexusin B

从河南省嵩县产内折香茶菜Rabdosiainflexus（Thunb．）叶中分得二种成分，一种是新的二萜，根据各种光谱数据推断其化学结构为Ⅰ，命名为内折香茶菜乙素（inflexusinB）；另一种成分鉴定为齐墩果酸。内折香茶菜乙素有明显的细胞毒和抑菌作用。

From the leaves of Rabdosia inflexus (Thumb.)Hara.,a new diterpenoid,named inflexusin B,together with a known compound,oleanolic acid was isolated. Its structure was established by spectroscopic and chemi cal evidence as Ⅰ. Inflexusin B showed significant cytotoxicity against Ehrlich carcinoma cell in vitro