title: The flavonoids of leek, Allium porrum.
abstract: A phytochemical investigation of the extracts obtained from bulbs of leek. Allium porrum L. has led to the isolation of five flavonoid glycosides based on the kaempferol aglycone. Two of them are new compounds and have been identified as kaempferol 3-O-[2-O-(trans-3-methoxy-4-hydroxycinnamoyl)-beta-D-galactopyranosyl]-(1-->4)-O-beta-D-glucopyranoside, and kaempferol 3-O-[2-O-(trans-3-methoxy-4-hydroxycinnamoyl)-beta-D-glucopyranosyl]-(1-->6)-O-beta-D-glucopyranoside, on the basis of spectroscopic methods, including 2D NMR. The isolated compounds have been evaluated for their human platelet anti-aggregation activity.
authors.affiliation: Dipartimento di Chimica delle Sostanze Naturali, Università di Napoli Federico II, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Fattorusso
authors.forename: V
authors.initials: V
authors.lastname: Lanzotti
authors.forename: O
authors.initials: O
authors.lastname: Taglialatela-Scafati
authors.forename: C
authors.initials: C
authors.lastname: Cicala
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D006801:Humans; D044949:Kaempferols; D009682:Magnetic Resonance Spectroscopy; D019697:Onions / Q000737:chemistry*; D010974:Platelet Aggregation / Q000187:drug effects*; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D005419:Flavonoids; D044949:Kaempferols; C006552:kaempferol; D011794:Quercetin