DITERPENOIDS FROM RABDOSIA SCULPONEATA

Five ent-6,7-seco-karuene diterpenoids-enmein,epinodosin,sculponeatin A,C,D,were isolated from the dried leaves of Rabdosia sculponeata One of the compounds,named sculponeatin D,was previously unreported.Its structre was elucidated by the spectral data including 2D COSY,~1H-^(13)C correlation,2D NOESY spectroscopy.

Two New ent-Kauranoids from Isodon sculponeata

Two new ent-kaurane diterpenoids, sculponeatins L (1) and M (2), were isolated from the EtOAc extract of Isodon sculponeata. Their structures were elucidated by spectroscopic evidences. The cytotoxicities of 1 and 2 against human tumor cells K562 and T24 were tested.

黄花香茶菜的二萜成分研究

目的 研究黄花香茶菜 Isodon sculponeata(Vaniot) Hara的化学成分。方法 利用反复硅胶柱层析进行分离和纯化 ,通过理化方法及光谱分析鉴定其结构。结果 从黄花香茶菜干叶的丙酮提取物中分得 6个对映 -贝壳杉烷型二萜化合物 ,其中一个为新化合物 ,命名为黄花香茶菜戊素 (sculponeatin E, ) ,其余二萜化合物分别鉴定为延命草素 (enmein, ) ,epinodosin( ) ,epinodosinol( ) ,大萼变形甲素 (m acrocalyxoformin A, )和大萼变型乙素 (macrocalyxoform in B, )。结论 化合物 为新化合物 ,化合物 和 系首次从该植物中分得。

贵州紫云产黄花香茶菜的化学成分研究

采用甲醇回流提取和硅胶柱层析方法,从紫云产黄花香茶菜中分离得到6个化合物,结合1H-NMR、13C-NMR数据及文献资料鉴定为黄花香茶菜乙素(Ⅰ)、黄花香茶菜丁素(Ⅱ)、大萼变型香茶菜甲素(Ⅲ)、3β-Hydroxy-18α,19α-urs-20-en-28-oic acid(Ⅳ)、齐墩果酸(Ⅴ)和熊果酸(Ⅵ)。其中化合物Ⅳ为首次从该属植物中分离得到。