title: A flavonoid sulphate and other compounds from the roots of Centaurea bracteata.
abstract: The roots of Centaurea bracteata Scop. (Asteraceae) have been studied for the first time. Twenty-three compounds were isolated and identified, namely a sterol glucoside, two quinic acid derivatives, one sugar, and 19 flavonoids (five sulphates), one of which, centaradixin, resulted in a new natural product. Structural elucidation was performed mainly by means of FABMS, 1D and 2D NMR spectroscopy. NMR data of some sulphate flavonoids are reported for the first time.
authors.affiliation: Dipartimento di Chimica Bioorganica e Biofarmacia, Universita di Pisa, Via Bonanno 33, 56126 Pisa, Italy. flamini@farm.unipi.it
authors.forename: G
authors.initials: G
authors.lastname: Flamini
authors.forename: M
authors.initials: M
authors.lastname: Pardini
authors.forename: I
authors.initials: I
authors.lastname: Morelli
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D018517:Plant Roots / Q000737:chemistry
chemical_list: D005419:Flavonoids; C447011:centaradixin