title: Antioxidant flavonoids from Alhagi maurorum.
abstract: A new flavonoid, isorhamnetin-3-O-[-alpha-l-rhamnopyranosyl-(1 --> 3)]-beta-D-glucopyranoside (1), along with two known flavonoids 3'-O-methylorobol (2) and quercetin 3-O-beta-d-glucopyranoside (3), was isolated from Alhagi maurorum. Their structures were established with the help of mass spectrometry, 1D and 2D NMR spectroscopy, and in comparison with the literature data. Compounds 1 and 2 exhibited moderate antioxidant activity in the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging assay.
authors.affiliation: Department of Pharmacy, Faculty of Pharmacy and Alternative Medicine, Railway Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan. rsahmed_iub@yahoo.com
authors.forename: Saeed
authors.initials: S
authors.lastname: Ahmad
authors.forename: Naheed
authors.initials: N
authors.lastname: Riaz
authors.forename: Muhammad
authors.initials: M
authors.lastname: Saleem
authors.forename: Abdul
authors.initials: A
authors.lastname: Jabbar
authors.lastname: Nisar-Ur-Rehman
authors.forename: Mohammad
authors.initials: M
authors.lastname: Ashraf
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D001713:Biphenyl Compounds; D007887:Fabaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010851:Picrates; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D005419:Flavonoids; D016166:Free Radical Scavengers; D005960:Glucosides; D010851:Picrates; C549175:isorhamnetin-3-O-(rhamnopyranosyl-(1-3))glucopyranoside; C004931:1,1-diphenyl-2-picrylhydrazyl