title: [The structures of yiyeliangwanoside III and IV from the bark of Nothopanax davidii (France) Harms].
abstract: Two new oleanane type triterpene glycosides, named Yiyeliangwanoside III and IV, were isolated from Nothopanax davidii (France)Harms (Araliaceae). Their chemical structures were elucidated by means of chemical and spectrometric analysis. Yiyeliangwanoside III: C57H88O25, a white powder, mp 206-210 degrees C (dec.), [alpha]D + 2.73 (c 0.1, CH3OH). Its structure was determined as 3-O-alpha (2',4'-O-diacetyl)-L-arabinopyranosyl-3 beta-hydroxyolean-12-ene-28.29- dioicacid-28-O-[alpha-L-rhamnopyranosyl-(1-4)-beta-D-glucopyranosy l-(1-6)- beta-D-glucopyranosyl] ester. Yiyeliangwanoside IV: C37H56O10, a white powder, mp 267-170 degrees C (dec.), [alpha]20D + 31.55 degrees (c 0.1, CH3OH). Its structure was determined as 3-O-alpha-(2'-O-acetyl)-D-xylopyranosyl-3 beta-hydroxyolean-12-ene-28.29-dioic acid.
authors.affiliation: Institute of Materia Medica, West China University of Medical Science, Chengdu.
authors.forename: S S
authors.initials: SS
authors.lastname: Yu
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Xiao
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D006027:Glycosides; D014315:Triterpenes; C076803:yiyeliangwanoside IV; C076802:yiyeliangwanoside III