title: Flavonoid composition and antimicrobial activity of Cirsium rivulare (Jacq.) All. flowers.
abstract: A new flavonoid compound isokaempferide 7-O-beta-d-(6''-methylglucuronide) (1) was isolated from flowers of Cirsium rivulare (Jacq.) All. Its structure was elucidated on the basis of spectroscopic studies (UV, (1)H and (13)C NMR, FABMS). Moreover, five known flavonoid compounds: apigenin 7-(6''-methylglucuronide) (2), hispidulin 7-glucoside (3), isokaempferide 7-glucuronide (4), kaempferol 3-galactoside (5), pectolinarin (6) were isolated from this source for the first time. The antimicrobial activity of aqueous, methanolic and 70% ethanolic extracts of Cirsium rivulare flowers and leaves was also evaluated.
authors.affiliation: Department of Pharmacognosy, Medical University of Białystok, Mickiewicza 2a Street, Białystok 15-089, Poland. nazaruk@amb.edu.pl
authors.forename: Jolanta
authors.initials: J
authors.lastname: Nazaruk
authors.forename: Piotr
authors.initials: P
authors.lastname: Jakoniuk
mesh_terms: D000890:Anti-Infective Agents / Q000302:isolation & purification* / Q000494:pharmacology; D031180:Cirsium / Q000737:chemistry*; D005419:Flavonoids / Q000032:analysis / Q000302:isolation & purification* / Q000494:pharmacology; D035264:Flowers / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010936:Plant Extracts / Q000494:pharmacology*
chemical_list: D000890:Anti-Infective Agents; D005419:Flavonoids; D010936:Plant Extracts