Collect. Czech. Chem. Commun. 1985, 50, 2914-2917

Iridoid glucosides from Penstemon diffusus

Joanna Diak and Stanisłav Kohlmünzer

Department of Phytochemistry, Institute of Pharmacology, Polish Academy of Sciences, 31-343 Krakow, Poland


From the aerial parts of Penstemon diffusus DOUGL. (Scrophulariaceae) have been isolated three iridoid glucosides: penstemide (I), aucubin (V), and loganin (VIII). The identity of the compounds and their derivatives has been confirmed by spectroscopic data.