title: Isolation, identification, and antioxidant activity of three stilbene glucosides newly extracted from vitis vinifera cell cultures
abstract: Suspension cultures of Vitis vinifera L. (Vitaceae) produce many hydroxylated stilbene glucosides found in red wine. From these cells, we isolated and characterized glycosylated stilbenes, (Z)-piceatannol (3,5,3',4'-tetrahydroxystilbene) -3-O-beta-d-glucopyranoside (6) and (E)- and (Z)-resveratrol (3,5, 4'-trihydroxystilbene)-4'-O-beta-d-glucopyranoside (2 and 7, respectively), which have not previously reported to be constituents of Vitis vinifera or wine. The ability of these compounds to act as radical scavengers was investigated using 1,1 diphenyl-2-picryl-hydrazyl, a stable free radical. Antioxidant activities were assessed by their capacity to prevent Cu2+-induced lipid peroxidation in human low-density lipoprotein.
authors.affiliation: Groupe d'Etude des Substances Naturelles a Interet Therapeutique, EA 491, Faculte des Sciences Pharmaceutiques, Universite de Bordeaux 2, 3 place de la Victoire, 33000 Bordeaux, France, and Centre d'Etudes et de Recherche sur les Xenob.
authors.lastname: Waffo Teguo P
authors.initials: B
authors.lastname: Fauconneau
authors.initials: G
authors.lastname: Deffieux
authors.initials: F
authors.lastname: Huguet
authors.initials: J
authors.lastname: Vercauteren
authors.initials: JM
authors.lastname: Merillon