title: Antioxidant xanthones from Garcinia vieillardii.
abstract: Two new xanthones, 6-O-methyl-2-deprenylrheediaxanthone B (1) and vieillardixanthone (2), were isolated from the stem bark of Garcinia vieillardii, as were four known compounds (4-7). The structures of 1 and 2 were determined by means of spectroscopic analysis and chemical derivatization. Each isolate was tested for its antioxidant properties based on a scavenging activity study using the stable 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical.
authors.affiliation: SONAS, UFR des Sciences Pharmaceutiques et Ingénierie de la Santé, 16 Bd Daviers, F-49100 Angers, France.
authors.forename: Anne-Emmanuelle
authors.initials: AE
authors.lastname: Hay
authors.forename: Marie-Christine
authors.initials: MC
authors.lastname: Aumond
authors.forename: Sabine
authors.initials: S
authors.lastname: Mallet
authors.forename: Vincent
authors.initials: V
authors.lastname: Dumontet
authors.forename: Marc
authors.initials: M
authors.lastname: Litaudon
authors.forename: David
authors.initials: D
authors.lastname: Rondeau
authors.forename: Pascal
authors.initials: P
authors.lastname: Richomme
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D029760:Garcinia / Q000737:chemistry*; D015394:Molecular Structure; D009510:New Caledonia; D019906:Nuclear Magnetic Resonance, Biomolecular; D010851:Picrates / Q000494:pharmacology; D024301:Plant Bark / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: C486261:6-O-methyl-2-deprenylrheediaxanthone B; D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; D044004:Xanthones; C486262:vieillardixanthone; C004931:1,1-diphenyl-2-picrylhydrazyl