title: Structural revisions of blumenol C glucoside and byzantionoside B.
abstract: The absolute stereochemistry of blumenol C glucoside and byzantionoside B was revised here as (6R,9S)- and (6R,9R)-9-hydroxymegastigman-4-en-3-one 9-O-beta-D-glucopyranosides, respectively, by modified Mosher's method. The empirical rules of (13)C-NMR chemical shift to determine the absolute stereochemistry of C-9 of 9-hydroxymegastigmane 9-O-beta-D-glucopyranoside were also discussed.
authors.affiliation: Department of Pharmacognosy, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima 734-8553, Japan.
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Hideaki
authors.initials: H
authors.lastname: Otsuka
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Takeda
mesh_terms: D005960:Glucosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D008968:Molecular Conformation; D045792:Norisoprenoids / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D012015:Reference Standards; D013237:Stereoisomerism; D064028:Tracheophyta / Q000737:chemistry*
chemical_list: D005960:Glucosides; D045792:Norisoprenoids; C549754:byzantionoside B; C549752:9-hydroxymegastigman-4-en-3-one 9-O-beta-D-glucopyranoside