title: First evidence of C- and O-glycosyl flavone in blood orange (Citrus sinensis (L.) Osbeck) juice and their influence on antioxidant properties.
abstract: RP-LC-DAD-ESI-MS-MS separation/identification protocol has been employed for the identification and characterisation of nine C- and O-glycosyl flavonoids in Moro (Citrus sinensis (L.) Osbeck) juice grown in Southern Italy. For the first time we reported the presence of five C-glycosyl flavones (lucenin-2, vicenin-2, stellarin-2, lucenin-2 4'-methyl ether and scoparin), a 3-hydroxy-3-methylglutaryl glycosyl flavonol (3-hydroxy-3-methylglutaryl glycosyl quercetin) and a flavone O-glycosides (chrysoeriol 7-O-neoesperidoside). Moreover, the influence of the identified C- and O-glycosyl flavonoids on the total antioxidant activity of crude juice has been evaluated on the basis of its ability to scavenge DPPH•, OH• and ABTS•+ radicals and to reduce iron.
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy. Electronic address: dbarreca@unime.it.
authors.forename: Davide
authors.initials: D
authors.lastname: Barreca
authors.forename: Ersilia
authors.initials: E
authors.lastname: Bellocco
authors.forename: Ugo
authors.initials: U
authors.lastname: Leuzzi
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Gattuso
mesh_terms: D000975:Antioxidants / Q000737:chemistry*; D001628:Beverages / Q000032:analysis*; D032084:Citrus sinensis / Q000737:chemistry*; D047309:Flavones / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D047309:Flavones; D010936:Plant Extracts; C043562:flavone
keywords: Antioxidant activity; Blood orange; Citrus sinensis (L.) Osbeck; Flavonoids; HPLC-DAD-ESI-MS-MS