title: Flavonoid Glucuronides from the Flowers of Arnica montana1.
abstract: Five flavonoid glucuronides were identified from flowers of ARNICA MONTANA L. The structures were established on the basis of total acid hydrolysis and spectral data (UV, (1)H-NMR, (13)C-NMR, mass) as 3- O-beta- D-glucuronides of quercetin, kaempferol, isorhamnetin, patuletin, and 6-methoxykaempferol. The last one is a new natural compound. This is the first report on glucuronides in the genus ARNICA. Additionally, tricin and 3,5,7-trihydroxy-6,3',4'-trimethoxyflavone were identified. Up to now these two flavonoid aglycones have been rarely found in the family of the Asteraceae.
authors.affiliation: Institut für Pharmazeutische Biologie der Universität Düsseldorf, Geb. 26.23, Universitätsstr. 1, D-4000 Düsseldorf 1, Federal Republic of Germany.
authors.forename: I
authors.initials: I
authors.lastname: Merfort
authors.forename: D
authors.initials: D
authors.lastname: Wendisch