[Pinifolin, a new iridoid glucoside of unusual type from Penstemon pinifolius].
From the aerial parts of PENSTEMON PINIFOLIUS Greene, a new iridoid glucoside of unusual type has been isolated and structurally elucidated by spectroscopic means. This new compound, called pinifolin, contains a Delta (4)-instead of a Delta (3)-double bond and a methyl ether function at carbon 3 of the iridoidic skeleton.
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Institut für Pharmazeutische Biologie der Universität Düsseldorf, Universitätsstrasse, Düsseldorf, Federal Republic of Germany.