methyl-13-hydroperoxy-9-11-octadecadienoate and 1-1-diphenyl-2-picrylhydrazyl

Forty-three secondary metabolites were isolated and characterized from cv. Annurca apple fruit, an apple variety cultivated in the south of Italy. This apple cultivar undergoes a typical reddening treatment after collection. All of the compounds were characterized on the basis of their spectroscopic data. The compounds were tested for their radical-scavenging and antioxidant activities by measuring their capacity to scavenge DPPH* (2,2'-diphenyl-1-picrylhydrazyl radical), H2O2, and NO (nitric oxide) and to inhibit the formation of methyl linoleate conjugated diene hydroperoxides or TBARS (thiobarbituric acid reactive species).

Topics: Antioxidants; Biphenyl Compounds; Flavonoids; Free Radical Scavengers; Fruit; Hydrogen Peroxide; Lipid Peroxides; Malus; Nitric Oxide; Oxidation-Reduction; Phenols; Picrates; Polyphenols; Thiobarbituric Acid Reactive Substances