[Barbatoside, a new Iridoid glucoside from Penstemon barbatus].
From leaves of Penstemon barbatus Nutt. a new iridoid glucoside has been isolated. The structure was established mainly by spectroscopic methods ( (1)H-NMR, (13)C-NMR, IR, MS).
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Institut für Pharmazeutische Biologie der Philipps-Universität Marburg, Bundesrepublik Deutschland.