论文部分内容阅读
Two new steroidal glycosides named eyanoauriculoside A(1)and B(2),have been isolated from the roots of Cynanchum auriculatum Royle ex Wight.The structure of cyanoauriculoside A(1)was determined to be 20-O-acetyl-penupogenin-3-O-β-Dglucopyranosyl-(1→4)-β-D-glucopyranosyl-(1→4)-α-L-cymaropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-α-L-diginopyranosyl-(1→4)-β-D-cymaropyranoside.Cyanoauriculoside B(2)was characterized as 20-O-acetylpenupogenin-3-O-β-D-glucopyranosyl-(1→4)-α-L-cymaropyranosyl-(1→4)-β-D-cymaropyranosyl-(1→4)-α-L-diginopyranosyl-(1→4)-β-D-cymaropyranoside.The structures of these compounds were elucidated based on the chemical and spectroscopic evidence.