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Oleuropein is an antioxidant olive constituent, but it is liable to degrade into hydroxytyrosol. Oleuropein extract was hydrolyzed by hemicellulase and the results presented that 14 phenols were identified in the ethyl acetate extract of enzymatic hydrolysate by HPLC‐MS. Antioxidant activities (DPPH, ABTS, total reducing power, FRAP, and Fe2+ chelating ability) of phenols were all added with the...
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