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Journal of Agricultural and Food Chemistry 2007-Dec

New C-deoxyhexosyl flavones and antioxidant properties of Passiflora edulis leaf extract.

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Krækjan er vistuð á klemmuspjaldið
Federico Ferreres
Carla Sousa
Patrícia Valentão
Paula B Andrade
Rosa M Seabra
Angel Gil-Izquierdo

Lykilorð

Útdráttur

The flavonoids present in passion fruit (Passiflora edulis) leaves were identified by a high-performance liquid chromatography-diode array detection-tandem mass spectrometry (HPLC-DAD-MS/MS) method. Sixteen apigenin or luteolin derivatives were characterized, which included four mono-C-glycosyl, eight O-glycosyl- C-glycosyl, and four O-glycosyl derivatives. With the exceptions of C-hexosyl luteolin and C-hexosyl apigenin, all the compounds exhibited a deoxyhexose moiety. Moreover, the uncommon C-deoxyhexosyl derivatives of luteolin and apigenin have been identified for first time in P. edulis by HPLC-DAD-MS/MS. The antioxidative capacity of passion fruit leaves was checked against DPPH radical and several reactive oxygen species (superoxide radical, hydroxyl radical, and hypochlorous acid), revealing it to be concentration-dependent, although a pro-oxidant effect was noticed for hydroxyl radical.

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