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从美丽红豆杉(Taxus mairei)的茎皮中分离得三个新的二萜化合物,其中美丽红豆杉素A(taxamairin A,1)和美丽红豆杉素B(taxamairin B,2)是含有(艹卓)酮的三环二萜,它们的骨架尚未见文献报道;美丽红豆杉素C(taxamairin C,3)是含有半缩酮的四环二萜.结构鉴定应用了高分辨的~1H NMR,~(13)C NMR ~1H-~1H COSY和DFNOE等方法.美丽红豆杉素A的结构还通过X射线单晶衍射予以证实.
Three new diterpene compounds were isolated from the bark of Taxus mairei, of which taxamairin A (1) and taxamairin B (2) Zhuo) ketone tricyclic diterpenes, their skeleton has not been reported in the literature; taxolirin C (3) is a hemiketal containing tetracyclic diterpene structure identification using high-resolution ~ 1H NMR, ~ (13) C NMR ~ 1H- ~ 1H COZY and DFNOE, etc. The structure of the beautiful taxol A was also confirmed by X-ray single crystal diffraction.