title: New seco-anthraquinone glucosides from Rumex nepalensis.
abstract: 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.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, P. R. China.
authors.forename: Renqiang
authors.initials: R
authors.lastname: Mei
authors.forename: Hengxing
authors.initials: H
authors.lastname: Liang
authors.forename: Junfeng
authors.initials: J
authors.lastname: Wang
authors.forename: Linhong
authors.initials: L
authors.lastname: Zeng
authors.forename: Qing
authors.initials: Q
authors.lastname: Lu
authors.forename: Yongxian
authors.initials: Y
authors.lastname: Cheng
mesh_terms: 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
chemical_list: D000880:Anthraquinones; D005960:Glucosides