title: Triterpenoid saponins from the bark of Nothopanax davidii.
abstract: Three new triterpenoid saponins were isolated from the alcoholic extract of the bark of Nothopanax davidii. Their structures have been determined on the basis of spectral and chemical data as 3-O-alpha-(4'-O-acetyl)-L-arabinopyranosyl-3 beta-hydroxyolean-12-ene- 28,29-dioic acid-28-O-[alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl (1-->6)-beta-D-glucopyranosyl]ester, named yiyeliangwanoside IX; 3-O-alpha-(2'-O-acetyl)-L-arabinopyranosyl-3 beta-hydroxyolean-12-ene-28,29- dioic acid-28-O-[alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl(1-->6)- beta-D-glucopyranosyl] ester, named yiyeliangwanoside X; and 3-O-beta-d-xylopyranosyl-3 beta-hydroxyolean-12-ene-28,29-dioic acid-28-O-[alpha-L-rhamnopyranosyl(1-->4)-beta-D-glucopyranosyl(1-->6)-b eta-D - glucopyranosyl] ester, named yiyeliangwanoside XI.
authors.affiliation: Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing.
authors.forename: S S
authors.initials: SS
authors.lastname: Yu
authors.forename: D Q
authors.initials: DQ
authors.lastname: Yu
authors.forename: X T
authors.initials: XT
authors.lastname: Liang
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008516:Medicine, Chinese Traditional; D008969:Molecular Sequence Data; D009844:Oligosaccharides / Q000737:chemistry / Q000302:isolation & purification; D009904:Optical Rotation; D010946:Plants, Medicinal; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D013055:Spectrophotometry, Infrared; D014197:Trees; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D009844:Oligosaccharides; D012503:Saponins; D014315:Triterpenes