DITERPENOIDS OF RABDOSIA ERIOCALYX VAR.LAXIFLORA

Abstract

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

Shen Peiqiong Yunnan lnstitute of tropical Botany,Academia Sinica)Sun Handong*and Lin Zhongwen . DITERPENOIDS OF RABDOSIA ERIOCALYX VAR.LAXIFLORA[J]. Plant Diversity, 1986, 8(02): 1-3.

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DITERPENOIDS OF RABDOSIA ERIOCALYX VAR.LAXIFLORA

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