Serrulatoloside, a New Iridoid Glucoside from Penstemon serrulatus.
From leaves of PENSTEMON SERRULATUS Menz. a new iridoid glucoside of unusual type in having an exo double bond at C-8 on the cyclopentane-ring has been isolated. The structure of serrulatoloside has been established by spectroscopic methods.
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Institut für Pharmazeutische Biologie der Philipps-Universität Marburg, Deutsch-hausstraße 17S, D-3550 Marburg/L.