title: Antioxidant constituents from Cotoneaster racemiflora.
abstract: A new lignan rhamnoside, racemiside (1), has been isolated from the ethyl acetate-soluble fraction of Cotoneaster racemiflora, along with scopoletin (2), 7,8-dimethoxy-6-hydroxycoumarin (3), 3,3',4'-tri-O-methylellagic acid (4), and cereotagloperoxide (5), reported for the first time from this species. All of them showed profound antioxidative activities in the DPPH assay.
authors.affiliation: Pharmaceutical Research Centre, Karachi, Pakistan.
authors.forename: Shafiullah
authors.initials: S
authors.lastname: Khan
authors.forename: Naheed
authors.initials: N
authors.lastname: Riaz
authors.forename: Nighat
authors.initials: N
authors.lastname: Afza
authors.forename: Abdul
authors.initials: A
authors.lastname: Malik
authors.lastname: Aziz-ur-Rehman
authors.forename: Lubna
authors.initials: L
authors.lastname: Iqbal
authors.forename: Mehreen
authors.initials: M
authors.lastname: Lateef
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D001713:Biphenyl Compounds; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015394:Molecular Structure; D010154:Pakistan; D010851:Picrates / Q000494:pharmacology; D010946:Plants, Medicinal / Q000737:chemistry*; D027824:Rosaceae / Q000737:chemistry*; D012603:Scopoletin / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D006027:Glycosides; D017705:Lignans; D010851:Picrates; C539302:racemiside; C004931:1,1-diphenyl-2-picrylhydrazyl; D012603:Scopoletin