New C21 Steroidal Glycosides from Marsdenia tenacissima Study on C21 steroidal glycosides of Cynanchum atratum by LC-MS Cixi-ophiopogon A and B,C27 Steroidal Glycosides from Ophiopogon japonicum A new neolignan from fruit of Solanum torvum Studies on Chemical Constituents of Hemsleya graciliflora (Harms) Cogn. Distribution of C(21) steroidal glycosides in plants of Asclepiadaceae and their pharmacological activities Steroidal glycosides from Solanum nigrum Advances in studies on C21 steroidal glycosides of plants in Asclepiadaceae Current situation of research on Cynanchi Bungei Radix A New Steroidal Glycoside from Ophiopogon japonicus (Thunb.) Ker-Gawl. Deter mination of C21 steroidal glycosides in Marsdenia tenacissima by colorimetric method New Steroidal Glycosides from Ophiopogon japonicus