title: New antioxidant and antimicrobial ellagic acid derivatives from Pteleopsis hylodendron.
abstract: Bioassay-guided isolation of two new compounds, 3,4-methylenedioxy-3'-O-methyl-4'-O-glucoside ellagic acid (1) and the pteleoellagic acid derivative (2), from the stem bark of Pteleopsis hylodendron is reported along with 3,4-methylenedioxy-3'-O-methyl ellagic acid (3), 3,3'-di-O-methyl ellagic acid (4) and 3,3',4'-tri-O-methyl ellagic acid (5), which were obtained for the first time from this plant. The structures of these compounds were elucidated with the help of spectroscopic studies. Compounds 1 and 4 were found to have significant antioxidant activity, while compounds 1-4 showed antibacterial activity against different pathogenic bacteria.
authors.affiliation: International Center for Chemical Sciences, H. E. J. Research Institute of Chemistry, University of Karachi, Karachi, Pakistan.
authors.lastname: Atta-Ur-Rahman
authors.forename: F N
authors.initials: FN
authors.lastname: Ngounou
authors.forename: M I
authors.initials: MI
authors.lastname: Choudhary
authors.forename: S
authors.initials: S
authors.lastname: Malik
authors.forename: T
authors.initials: T
authors.lastname: Makhmoor
authors.forename: M
authors.initials: M
authors.lastname: Nur-E-Alam
authors.forename: S
authors.initials: S
authors.lastname: Zareen
authors.forename: D
authors.initials: D
authors.lastname: Lontsi
authors.forename: J F
authors.initials: JF
authors.lastname: Ayafor
authors.forename: B L
authors.initials: BL
authors.lastname: Sondengam
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001409:Bacillus cereus / Q000187:drug effects; D002855:Chromatography, Thin Layer; D003353:Corynebacterium diphtheriae / Q000187:drug effects; D004610:Ellagic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D007711:Klebsiella pneumoniae / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D011511:Proteus / Q000187:drug effects; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D012485:Salmonella typhi / Q000187:drug effects; D013056:Spectrophotometry, Ultraviolet; D013297:Streptococcus pyogenes / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000975:Antioxidants; D004610:Ellagic Acid