title: Quadranosides VI-XI, six new triterpene glucosides from the seeds of Combretum quadrangulare.
abstract: Six new triterpene glucosides, quadranosides VI-XI (1-6), belonging to three different [ursane- (1-4), oleanane- (5) and lupane-type (6)] triterpene classes, have been isolated from a MeOH extract of the seeds of Combretum quadrangulare KURZ (Combretaceae), together with nine known compounds, rosamutin (7), 28-O-beta-D-glucopyranosyl-6beta,23-dihydroxytormentic acid (8), arjunetin (9), arjunglucoside II (10), combreglucoside (11), chebuloside II (12), vitexin (13), (+)-catechin (14) and (-)-epigallocatechin (15). The structures of these compounds were elucidated by spectroscopic analysis.
authors.affiliation: Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Sugitani, Japan.
authors.forename: I K
authors.initials: IK
authors.lastname: Adnyana
authors.forename: Y
authors.initials: Y
authors.lastname: Tezuka
authors.forename: S
authors.initials: S
authors.lastname: Awale
authors.forename: A H
authors.initials: AH
authors.lastname: Banskota
authors.forename: K Q
authors.initials: KQ
authors.lastname: Tran
authors.forename: S
authors.initials: S
authors.lastname: Kadota
mesh_terms: D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*; D013057:Spectrum Analysis; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D005960:Glucosides; D014315:Triterpenes