title: Microtropins A-I: 6'-O-(2″S,3″R)-2″-ethyl-2″,3″-dihydroxybutyrates of aliphatic alcohol β-D-glucopyranosides from the branches of Microtropis japonica.
abstract: From the branches of Microtropis japonica (Celastraceae), nine aliphatic glucosides, named microtropins A-I, were isolated. The 6-position of glucose was esterified with (2S,3R)-2-ethyl-2,3-dihydroxybutyric acid. Microtropins A-D contained a rare natured product nitrile functional group in their aglycones. The absolute structures of the (2S,3R)-2-ethyl-2,3-dihydroxybutyric acid moiety and aglycone of microtropin A were determined by an X-ray crystallographic method.
authors.affiliation: Department of Pharmacognosy, Graduate School of Biomedical Sciences, Hiroshima University, Minami-ku, Hiroshima, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Uemura
authors.forename: Sachiko
authors.initials: S
authors.lastname: Sugimoto
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
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Kawahata
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yamaguchi
mesh_terms: D029753:Celastraceae / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005960:Glucosides / Q000737:chemistry*
chemical_list: D005960:Glucosides