title: Acylated Glycosidic Acid Methyl Esters Generated from the Convolvulin Fraction of Rhizoma Jalapae Braziliensis by Treatment with Indium(III) Chloride in Methanol.
abstract: Four hexaglycosides of methyl 3S,12S-dihydroxyhexadecanoate (1-4) were provided after treatment of the crude convolvulin fraction from Rhizoma Jalapae Braziliensis (the root of Ipomoea operculata (GOMES) MART., Convolvulaceae) with indium(III) chloride in methanol. The structures of 1-4 were elucidated on the basis of spectroscopic and chemical methods. Their sugar moieties were partially acylated with organic acids including (3S,9R)-3,6:6,9-diepoxydecanoic (exogonic) acid, (E)-2-methylbut-2-enoic (tiglic) acid, and isovaleric acid.
authors.affiliation: School of Agriculture, Tokai University.
authors.forename: Masateru
authors.initials: M
authors.lastname: Ono
authors.forename: Satoko
authors.initials: S
authors.lastname: Oda
authors.forename: Shin
authors.initials: S
authors.lastname: Yasuda
authors.forename: Tomoko
authors.initials: T
authors.lastname: Mineno
authors.forename: Masafumi
authors.initials: M
authors.lastname: Okawa
authors.forename: Junei
authors.initials: J
authors.lastname: Kinjo
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Miyashita
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Yoshimitsu
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
authors.forename: Kazumoto
authors.initials: K
authors.lastname: Miyahara
mesh_terms: D000143:Acids / Q000138:chemical synthesis* / Q000737:chemistry; D000215:Acylation; D027722:Convolvulaceae / Q000737:chemistry; D006027:Glycosides / Q000138:chemical synthesis* / Q000737:chemistry; D007204:Indium / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry*; D008738:Methyl Ethers / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry; D012116:Resins, Plant / Q000737:chemistry*
chemical_list: D000143:Acids; D006027:Glycosides; D008738:Methyl Ethers; D012116:Resins, Plant; C560812:convolvulin; D007204:Indium; C020758:indium trichloride; D000432:Methanol