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New Taxane Diterpenoids from Taxus yunnanensis
Ping Hai1, Shi-Zhen Wen1, Yan Li2
1BioBioPha Co., Ltd., Kunming, 650201 China.
Natural Products and Bioprospecting
|March 25, 2014
Abstract:
Three hitherto unknown taxane diterpenoids, namely baccatin VIII (1), baccatin IX (2), and baccatin X (3), along with 10 known analogues were isolated from an ethanolic extract of the twigs and leaves of Taxus yunnanensis. The new structures were characterized based on extensive spectroscopic analysis. Compounds 1 and 2 were tested for their in vitro cytotoxicity against five human tumor cell lines, and 1 exhibited inhibitory effects on HL-60 and MCF-7, with IC50 values of 3.44 and 9.67 μM, respectively.

