Abstract: During the course ofour studies on the biologically active con-stituents of Rabdosia plants,seven diterpenoids were isolated from the ether extract of the leaves ofRabdosia eriocalyx (Dunn) Hara var .laxifiora C.Y.Wu et H.LI COLLECTED FROM Xishuangbanna in Yunnan province.Four of them haem have been established as eriocalyxin B (=ent -6α,7α-dihydroxy-7β,20-epoxykaur-16-en -2, 3-ethenylene-l, 15-dione)(1) ,maoecrystai A(-ent-6α-hydroxy-15α-acetoxy-3β 20-epocalyxin-16-en-l,7-dione)(2,maoecrystal B(=ent-6α,7α-dihydroxy-15α-acetoxy-7β,20-epoxy-kaur-16-en-2,3-ethenylene-l-one)(3), and oridonin (4)from spectroscopic data,respectively.

Key words: Diterpenoids, 1H NMR

摘要： 从疏花毛萼香茶菜叶的乙醚提取物中一共分得七个二萜化合物，其中四个经各项光谱数据证明它们分别为毛萼乙素（1），毛萼晶甲（2），毛萼晶乙（3）和冬凌草索（4）。

关键词: 二萜化合物, 对映一贝壳杉烯, 疏花毛萼香茶莱, 毛萼乙素, 毛萼晶甲, 毛萼晶乙, 冬凌草素, 1H NMR