title: Megastigmane glycosides and an acylated triterpenoid from Eriobotrya japonica.
abstract: Two new megastigmane glycosides, eriojaposides A (1) and B (2), and a new acylated triterpenoid (3) were isolated along with nine known compounds from a leaf extract of Eriobotrya japonica. The structures of 1--3 were characterized as (6R,9R)-3-oxo-alpha-ionyl-9-O-beta-xylopyranosyl-(1' '-->6')-beta-glucopyranoside, (6R,9R)-3-oxo-alpha-ionyl-9-O-alpha-rhamnopyranosyl-(1' '-->6')-beta-glucopyranoside, and 3 alpha-trans-feruloyloxy-2 alpha-hydroxyurs-12-en-28-oic acid, respectively, on the basis of spectral and chemical evidence.
authors: Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Okayama 700-8530, Japan.
authors: H
authors: H
authors: Ito
authors: E
authors: E
authors: Kobayashi
authors: S H
authors: SH
authors: Li
authors: T
authors: T
authors: Hatano
authors: D
authors: D
authors: Sugita
authors: N
authors: N
authors: Kubo
authors: S
authors: S
authors: Shimura
authors: Y
authors: Y
authors: Itoh
authors: T
authors: T
authors: Yoshida
mesh_terms: D001208:Asia; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D045792:Norisoprenoids; D010946:Plants, Medicinal / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C433557:3-feruloyloxy-2-hydroxyurs-12-en-28-oic acid; D006027:Glycosides; D045792:Norisoprenoids; D014315:Triterpenes; C433555:eriojaposide A; C433556:eriojaposide B