The present invention relates to the bioactivity of taxanes isolated from the leaves of Himalayan Yew tree Taxus wallichiana against human cancer cell lines grown in-vitro and subsequent identification of brevifoliol [1] as anticancer agent useful in the treatment of various types of cancer in humans ##STR00001##

 
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> Formulations and methods of administration of cephalotaxines, including homoharringtonine

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