title: A new flavonoid and other polar compounds from Galeopsis angustifolia Ehrh. ex Hoffm.
abstract: The analysis of the polar fraction of Galeopsis angustifolia Ehrh. ex Hoffm. indicates that the main components are iridoids and flavonoids. Six compounds were identified: a new flavonoid, 3'-hydroxy-isoscutellarein 7-O-[6'″acetyl-β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranoside]; three iridoid glucosides: harpagide, acetyl harpagide and for the first time in this species, 8-epi-loganin; two known acetylated flavonoid glycosides: 3'-hydroxy-4'-O-methylisoscutellarein 7-O-[6'″acetyl-β-D-allopyranosyl-(1 → 2)-6″-acetyl-β-D-glucopyranoside], 3'-hydroxy-4'-O-methylisoscutellarein 7-O-[6'″acetyl-β-D-allopyranosyl-(1 → 2)-β-D-glucopyranoside]. Both flavonoids and iridoids are present in high amount; respectively, 16.7% and 4.5% of the crude extract.
authors.affiliation: Dipartimento di Chimica, Università di Roma La Sapienza, Piazzale Aldo Moro, 500185 Roma, Italy. alessandro.venditti@uniroma1.it
authors.forename: Alessandro
authors.initials: A
authors.lastname: Venditti
authors.forename: Anna Maria
authors.initials: AM
authors.lastname: Serrilli
authors.forename: Armandodoriano
authors.initials: A
authors.lastname: Bianco
mesh_terms: D005419:Flavonoids / Q000737:chemistry*; D039823:Iridoids / Q000737:chemistry*; D019686:Lamiaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D005419:Flavonoids; D039823:Iridoids