冬凌草中一新的二萜成分——冬凌草辛素

RUBESCENSIN H,A NEW DITERPENOID EXTRACTED FROM ISODON RUBESCENS

从河南省鹤壁地区产冬凌草 [Isodon rubescens( Hemsl.) Hara]叶中分得一个新的二萜化合物 ,命名为冬凌草辛素 ( Rubescensin H) ,经 NMR谱等确定其结构为 6β,7β,14β,15R-四羟基 - 11β-甲酰氧基 - 7α,2 0 -环氧 -对映 -贝壳杉 - 16-烯。

A new diterpenoid,named as rubescensin H 2 ,was isolated together with rubescensin C 1 from the leaves of lsodon rubescens collected in Hebi region of Henan province.The structure of2 was established as6 β,7β,1 4β,1 5 R- tetrahydroxy- 1 1 β- O- formyl- 7α,2 0 - epoxy- ent- kaur- 1 6 - ene by spectral methods including 1 H NMR,1 3C NMR,1 H- 1 H COSY,HMQC,HMBC and MS.