1987 Volume 35 Issue 4 Pages 1653-1655
The genuine sapogenin 20 (S) -protopanaxatriol (1) and its corresponding prosapogenin 20 (S) -ginsenoside-Rh1 (3) were prepared by direct treatment of the peracetate of 20 (S) -ginsenoside-Rg2 in an alcoholic alkaline solution. Two kinds of alkaline conditions were compared.