STRUCTURE OF PINGBEIDINOSIDE,AN ALKALOID ISOLATED FROM THE STEMS AND LEAVES OF FRITILLARIA USSURIENSIS MAXIM

A new steroid alkaloid glucoside,pingbeidinoside,was isolated from the stem and leaf of Fritillaria ussuriensis Maxim by column chromatographic techniques. On the basis of the IR, MS, ¹HNMR and ¹³CNMR spectra of pingpeidinoside and products of its transfomation, the structure of pingbeidinoside has been established as 3β,16α,20-trihydroxy-△⁵-22,26-epiminocholestane-25-O-β-D-glucoside.