title: Two ellagitannins from Punica granatum heartwood.
abstract: In the course of studies on polyphenol metabolism in Punica granatum heartwood two new ellagitannins, diellagic acid rhamnosyl (1-->4) glucopyranoside and 5-O-galloylpunicacortein D were isolated and characterized together with four known tannin metabolites, punicacortein D, punicalin, punicalagin and 2-O-galloylpunicalin. Structures of the isolated compounds were established by chromatography, chemical degradation, UV and 1D/ 2D 1H/13C NMR spectroscopy.
authors.affiliation: Institut für Pharmazie, Pharmazeutische Biologie, Universität Leipzig, Johannisallee 21-23, D-04103, Leipzig, Germany.
authors.forename: Sayed A A
authors.initials: SA
authors.lastname: El-Toumy
authors.forename: Hans W
authors.initials: HW
authors.lastname: Rauwald
mesh_terms: D004610:Ellagic Acid / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000302:isolation & purification*; D047348:Hydrolyzable Tannins; D029561:Lythraceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D035261:Plant Components, Aerial / Q000737:chemistry; D013634:Tannins / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: C473719:5-O-galloylpunicacortein D; D047348:Hydrolyzable Tannins; D013634:Tannins; C473718:diellagic acid rhamnosyl (1-4) glucopyranoside; D004610:Ellagic Acid