title: nor-Oleanene type triterpene glycosides from the leaves of Acanthopanax japonicus.
abstract: Three new (1-3) and two known (4-5) triterpene glycosides were isolated from the leaves of Acanthopanax japonicus (Araliaceae) and elucidated structurally by mass, 1D, and 2D NMR spectroscopy. All the compounds possessed a nor-oleanene triterpene skeleton as the aglycone. The structures of 1-5 were established as 28-O-alpha-L-rhamno-pyranosyl-(1-->4)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester of 3beta-hydroxy- 30-nor-olean-12,20(29)-diene-23,28-dioic acid, designated as acanjaposide A, 3beta- hydroxy-23-oxo-30-nor-olean-12,20(29)-diene-28-oic acid, named acanjaposide B, 3beta,20alpha-dihydroxy-23-oxo-30-nor-olean-12-en-28-oic acid, named acanjaposide C, and nipponoside E, a known saponin, respectively.
authors.affiliation: Faculty of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan. none@gpo.kumamoto-u.ac.jp
authors.forename: Sang-Yong
authors.initials: SY
authors.lastname: Park
authors.forename: Seung-Yeup
authors.initials: SY
authors.lastname: Chang
authors.forename: O-Jin
authors.initials: OJ
authors.lastname: Oh
authors.forename: Chang -Soo
authors.initials: C-
authors.lastname: Yook
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
mesh_terms: D027481:Araliaceae / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018515:Plant Leaves / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D006027:Glycosides; D014315:Triterpenes