title: Oleanane and ursane glycosides from Schefflera octophylla.
abstract: Twelve triterpene glycosides were isolated from the bark of Schefflera octophylla of Vietnamese origin. Three of them were identified as asiaticoside, cauloside D and 3 alpha-hydroxyurs-12-ene-23,28-dioic acid 28-O-alpha-L-rhamnopyranosyl (1-->4)-beta-D-glucopyranosyl(1-->6)-beta-D-glucopyranoside. The structures of nine new glycosides were elucidated by chemical and spectroscopic evidence. Including the known compounds, the 12 glycosides consisted of six pairs of corresponding ursene and oleanene glycosides and all of them had the same triose moiety at the C-28 position. The names scheffurosides A-F and scheffoleosides B-F were proposed for corresponding pairs of ursene and oleanene glycosides, respectively.
authors.affiliation: Institute of Pharmaceutical Sciences, Hiroshima University, School of Medicine, Japan.
authors.forename: C
authors.initials: C
authors.lastname: Maeda
authors.forename: K
authors.initials: K
authors.lastname: Ohtani
authors.forename: R
authors.initials: R
authors.lastname: Kasai
authors.forename: K
authors.initials: K
authors.lastname: Yamasaki
authors.forename: M D
authors.initials: MD
authors.lastname: Nguyen
authors.forename: T N
authors.initials: TN
authors.lastname: Nguyen
authors.forename: K Q
authors.initials: KQ
authors.lastname: Nguyen
mesh_terms: D002240:Carbohydrate Sequence; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010944:Plants / Q000737:chemistry*
chemical_list: D006027:Glycosides