C21 steroidal glycosides of seven sugar residues from Cynanchum otophyllum.
Two new C21-steroidal glycosides having hepta-saccharide residue were isolated from the rhizome of Cynanchum otophyllum Schneid. Their structures were determined to be caudatin 3-O-alpha-L-cymaropyranosyl-(1-->4)-alpha-D-oleandropyranosyl-(1-->4)-alpha-l-cymaropyranosyl-(1-->4)-beta-d-glucopyranosyl-(1-->4)-alpha-D-oleandropyranosyl-(1-->4)-beta-D-oleandropyranosyl-(1-->4)-beta-D-diginopyranoside (1), and caudatin 3-O-beta-D-cymaropyranosyl-(1-->4)-alpha-D-oleandropyranosyl-(1-->4)-alpha-L-cymaropyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->4)-beta-D-oleandropyranosyl-(1-->4)-beta-D-cymaropyranosyl-(1-->4)-beta-D-diginopyranoside (2) by spectral methods, respectively.
Zhao
Yi-Bin
YB
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Yunnan, Kunming 650204, People's Republic of China.
He
Hong-Ping
HP
Lu
Chun-Hua
CH
Mu
Quan-Zhang
QZ
Shen
Yue-Mao
YM
Hao
Xiao-Jiang
XJ
D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D002241:Carbohydrates / Q000737:chemistry*; D031105:Cynanchum / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D008969:Molecular Sequence Data; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry; D013256:Steroids / Q000737:chemistry*
D002241:Carbohydrates; D006027:Glycosides; D010936:Plant Extracts; D013256:Steroids