title: Dopaol 2-keto- and 2,3-diketoglycosides from Chelone obliqua.
abstract: Two unique 2-(3,4-dihydroxyphenyl)ethyl glycosides, namely, dopaol beta-D-2-ketoglucopyranoside and dopaol beta-D-2,3-diketoglucopyranoside, were isolated from Chelone obliqua together with the iridoid glucoside catalpol, dopaol beta-D-glucopyranoside, descaffeoylverbascoside, and verbascoside. Glycosides with a diketosugar have not so far been isolated from natural sources.
authors.affiliation: Department of Chemistry, The Technical University of Denmark, DK-2800, Lyngby, Denmark.
authors.forename: Henrik
authors.initials: H
authors.lastname: Franzyk
authors.forename: Carl Erik
authors.initials: CE
authors.lastname: Olsen
authors.forename: Søren Rosendal
authors.initials: SR
authors.lastname: Jensen
mesh_terms: D003718:Denmark; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D039823:Iridoids / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D028083:Scrophulariaceae / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D005960:Glucosides; D006027:Glycosides; D039823:Iridoids; C488321:dopaol beta-D-2,3-diketoglucopyranoside; C488320:dopaol beta-D-2-ketoglucopyranoside