title: Iridoid Glucosides from Penstemon nitidus.
abstract: From the leaves of PENSTEMON NITIDUS Dougl. (smooth blue beardtongue) besides the known iridoid glucosides cornin (syn. verbenalin), hastatoside and beta-dihydrohastatoside the new compound 10-hydroxycornin has been isolated. The structures of all compounds were established by spectroscopic means (FD-MS, (1)H-, (13)C-, 2D-NMR, and NOE). This is the first report of cornin and analogous 6-keto iridoids in scrophulariaceous plants. Up to now iridoid glucosides like these have only been found in plants belonging to the Cornaceae and its allies and to the Lamiaceae-Verbenaceae complex.
authors.affiliation: Institut für Pharmazeutische Biologie der Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-4000 Düsseldorf 1, Federal Republic of Germany.
authors.forename: D
authors.initials: D
authors.lastname: Teborg
authors.forename: P
authors.initials: P
authors.lastname: Junior