A taraxasterol derivative and phenolic compounds from Hieracium gymnocephalum

Abstract

From the aerial parts of Hieracium gymnocephalum the new triterpene, 21α-hydroxy-taraxasterol and flavone diglycosides luteolin 7-O-α-L- rhamnosyl(1 → 6)-β-D-glucoside and luteolin 7-O-β-D-xylosyl(1 → 6)-β-D- glucoside were isolated, as well as further common triterpenes, phenolic acids and flavones. The structures were established from spectral data (UV, MS, 1H and 13C NMR).