title: Antioxidant activity and two new flavonoids from Washingtonia filifera.
abstract: Two new flavonoids, 8-hydroxyisoscoparin (1) and luteolin 7-O-glucoside 4''-sulfate (2), along with eight known flavonoids, including luteolin 7-O-glucoside 2''-sulfate, were isolated and identified from Washingtonia filifera. All compounds were characterized by (1)H-NMR, (13)C-NMR, CI-MS, FABMS and UV. The antioxidant activities of various W. filifera extracts were determined.
authors.affiliation: Department of Tanning Materials and Protein Chemistry, National Research Centre, El-Tahrir St., Dokki, Cairo, Egypt. nabil_17@yahoo.com
authors.forename: N H
authors.initials: NH
authors.lastname: El-Sayed
authors.forename: N M
authors.initials: NM
authors.lastname: Ammar
authors.forename: S Y
authors.initials: SY
authors.lastname: Al-Okbi
authors.forename: L T Abou
authors.initials: LT
authors.lastname: El-Kassem
authors.forename: T J
authors.initials: TJ
authors.lastname: Mabry
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D028023:Arecaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D009682:Magnetic Resonance Spectroscopy; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet
chemical_list: C508661:8-hydroxyisoscoparin; D000975:Antioxidants; D005419:Flavonoids; C508660:luteolin 7-O-glucoside 4''-sulfate