ABSTRACT
Objective To research the derivatives of panax notoginseng sapogenins and their anti-tumor activities. Methods The ginsenosides Rg1 was treated with Smith degradation. The products were separated and purified by silica gel column chromatography. The structures of the products were determined by NMR spectra. The activity of anti-tumor cells of compound (1) and 1'-hydroxyethanedioxy PT was detected with CDC25B activity assay and fluorescence technique. Results 1'-hydroxyethanedioxy PT , 20 (s)-protopanaxatriol (PT), and 24, 25 - en-3β, 6 α-dihydroxy-12, 20-(1', 2'-isopropylidenedioxy) propanedioxy-dammarane (1) were isolated and identified. Conclusion Compound (1), named 1',2'-isopropylidenedioxy-propanedioxy-pro-panedioxy , is a novel derivative of panax notoginseng sapogenin with better inhibitory activity against CDC25B.