title: Spectroscopic identification and antioxidant activity of glucosylated carotenoid metabolites from Cydonia vulgaris fruits.
abstract: Carotenoid metabolites are common plant constituents with significant importance for the flavor and aroma of fruits. Three new carotenoid derivatives, (2E,4E)-8-hydroxy-2,7-dimethyl-2,4-decadiene-1,10-dioic acid 1-O-beta-D-glucopyranosyl ester (1), (2Z,4E)-8-beta-D-glucopyranosyloxy-2,7-dimethyl-2,4-decadiene-1,10-dioic acid (3), and 3,9-dihydroxymegastigmast-5-ene-3-O-[beta-D-glucopyranosyl-(1-->6)]-beta-D-glucopyranoside (5), as well as three known compounds, have been isolated from the ethanolic extract of peels of Cydonia vulgaris, the fruit of a shrub belonging to the same family as the apple. All the compounds were identified by spectroscopic techniques, especially 1D and 2D NMR. Antioxidant activities of all the isolated metabolites were assessed by measuring their ability to scavenge DPPH radical and superoxide radical (O2*-) and to induce the reduction of Mo(VI).
authors.affiliation: Laboratorio Integrato per la Qualità e la Sicurezza degli Alimenti, Centro Regionale di Competenza Produzioni Agroalimentari, Dipartimento di Scienze della Vita, Seconda Università degli Studi di Napoli, Caserta, Italy. antonio.fiorentino@unina2.it
authors.forename: Antonio
authors.initials: A
authors.lastname: Fiorentino
authors.forename: Brigida
authors.initials: B
authors.lastname: D'Abrosca
authors.forename: Severina
authors.initials: S
authors.lastname: Pacifico
authors.forename: Claudio
authors.initials: C
authors.lastname: Mastellone
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Piscopo
authors.forename: Pietro
authors.initials: P
authors.lastname: Monaco
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D002338:Carotenoids / Q000032:analysis* / Q000378:metabolism / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000494:pharmacology; D005638:Fruit / Q000737:chemistry*; D006031:Glycosylation; D009682:Magnetic Resonance Spectroscopy; D027824:Rosaceae / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D002338:Carotenoids