C21 steroidal glycosides from Cynanchum wallichii Wight.
Three new C21 steroidal glycosides, characterized with rostratamine and qinyangshengenin as aglycone moiety and 2,6-dideoxy-pyranoses as component sugars, have been isolated from the roots of Cynanchum wallichii Wight. The structures of the three new C21 steroidal glycosides were elucidated as rostratamine-3-O-beta-D-oleandropyranosyl-(1 --> 4)-beta-d-cymaropyranosyl-(1 --> 4)-beta-D-cymaropyranoside, qinyangshengenin-3-O-beta-D-cymaropyranosyl-(1 --> 4)-beta-D-digitoxo-pyranoside, and qinyangshengenin-3-O-beta-D-oleandropyranosyl-(1 --> 4)-beta-D-cymaropyranosyl-(1 --> 4)-beta-D-digitoxopyranoside.
Chen
Gang
G
School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China.
Xu
Nan
N
Pei
Yue-Hu
YH
D031105:Cynanchum / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010840:Phytosterols / Q000737:chemistry / Q000302:isolation & purification*
D004365:Drugs, Chinese Herbal; D006027:Glycosides; D010840:Phytosterols; C539880:qinyangshengenin-3-O-beta-D-cymaropyranosyl-(1-4)-beta-D-digitoxo-pyranoside; C539878:qinyangshengenin-3-O-beta-D-oleandropyranosyl-(1-4)-beta-D-cymaropyranosyl-(1-4)-beta-D-digitoxopyranoside; C539879:rostratamine-3-O-beta-D-oleandropyranosyl-(1-4)-beta-D-cymaropyranosyl-(1-4)-beta-D-cymaropyranoside