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A pair of diastereoisomeric steroidal saponins were obtained from the saponin fraction (SF) of methanol extracts from Tupistra chinensis rhizomes, collected in Shennongjia Forest District, China. Based on the chemical and spectroscopic evidences, their structures were determined as shown in Fig. 1. The sample SF displayed marked inhibitory action in vitro towards HeLa and HL-60 cancer cell lines at 10 microg/ml by MTT method.

A Pair of Diastereoisomeric Steroidal Saponins from Cytotoxic Extracts of Tupistra chinensis Rhizomes