Bioorganic and Medicinal Chemistry Letters 2002-Oct
Multidrug resistant cancer cells susceptibility to cytotoxic taxane diterpenes from Taxus yunnanensis and Taxus chinensis.
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Twelve taxane diterpenes (1-12), which were isolated previously from the EtOH extract of the aerial parts of Taxus yunnanensis or Taxus chinensis, were evaluated for cytotoxicity against the multidrug resistant cancer cells KB-VIN and KB-7d. Compounds and showed significant cytotoxicity in these cell lines. Compounds and also demonstrated significant activity against KB-7d. The biflavonoid isolated from T. yunnanensis was only marginally cytotoxic against the A549 (lung) cell line, but a simple methoxylated analogue (14) was inactive.
