Determination of six kinds of index components in Dieda Zhitong San by HPLC-DVD variable wavelength method Isolation and Indentification of Steroidal Saponins from Dioscorea zingiberensis Wright STUDIES ON THE MOLLUSCICIDAL CONSTITUENTS OF DIOSCOREA ZINGIBERENSIS Isolation and Identification of Steroidal Saponins from Dioscorea panthaica Prain et Burkill Isolation and Indentification of Protosaponins from Fresh Rhizomes of Dioscorea zingiberensis Wright Determination of seven kinds of steroidal saponins in plants of Paris L. from different habitats by HPLC Determination of seven kinds of steroidal saponins in plants of ParisL. from different habitats by HPLC