title: A glycerol α-D-glucuronide and a megastigmane glycoside from the leaves of Guettarda speciosa L.
abstract: From the 1-BuOH-soluble fraction of a MeOH extract of the leaves of Guettarda speciosa L., two new compounds (1, 2) were isolated together with six known compounds. Spectroscopic analysis of 1 and 2 established their structures to be derivatives of a glycerol α-glucuronide and a megastigmane glycoside, respectively. HPLC analysis of the hydrolyzate of 1 confirmed the presence of D-glucuronic acid in the structure, and the modified Mosher's method established the absolute structure of 2.
authors.affiliation: Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan.
authors.forename: Wen-Hu
authors.initials: WH
authors.lastname: Cai
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Hideaki
authors.initials: H
authors.lastname: Otsuka
authors.forename: Takakazu
authors.initials: T
authors.lastname: Shinzato
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Takeda
mesh_terms: D002851:Chromatography, High Pressure Liquid; D003512:Cyclohexanones / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D045792:Norisoprenoids / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D019666:Rubiaceae / Q000737:chemistry*
chemical_list: D003512:Cyclohexanones; D005960:Glucosides; D006027:Glycosides; D045792:Norisoprenoids; C413264:megastigmane