New seco-anthraquinone glucosides from Rumex nepalensis.
Investigation of the N-BuOH extract of the roots of Rumex nepalensis afforded two new seco-anthraquinone glucosides, nepalensides A and B, along with nine known compounds, torachrysone ( 3), rumexoside, orientaloside, orcinol glucoside, aloesin, lyoniresinol 3 alpha- O- beta- D-glucopyranoside, (-)-epicatechin-3- O-gallate, (3,5-dimethoxy-4-hydroxyphenol)-1- O- beta- D-(6- O-galloyl) glucose, and (-)-epicatechin. Their structures were elucidated on the basis of spectroscopic methods. The possible formation of nepalensides A and B is briefly discussed.
Mei
Renqiang
R
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, P. R. China.
Liang
Hengxing
H
Wang
Junfeng
J
Zeng
Linhong
L
Lu
Qing
Q
Cheng
Yongxian
Y
D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D031804:Rumex / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods
D000880:Anthraquinones; D005960:Glucosides