Homoharringtonine and harringtonine are esters of cephalotaxine and are naturally occurring alkaloids in certain coniferous trees in China. These compounds have been shown to have activity against certain types of leukemia in cell cultures, experimental animals, and initial clinical trials in China,
A high-performance liquid chromatographic procedure was developed for the quantitation of homoharringtonine in plasma. Harringtonine was used as an internal standard, and 1 ml of sample was required. The single-step extraction with dichloromethane resulted in almost 100% recovery for
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