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Two ellagitannins from Punica granatum heartwood
Sayed A A El-Toumy1, Hans W Rauwald
1Institut für Pharmazie, Pharmazeutische Biologie, Universität Leipzig, Johannisallee 21-23, D-04103, Leipzig, Germany.
Phytochemistry
|November 28, 2002
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.