Moreover, (+)-catechin, ( )-epicatechin, protocatechuic, caffeic and syringic acids contents exhibited strong positive correlations with five antioxidant activity assays (ranging from 0.341 to 0.688, p < 0.05), except for the case of syringic acid for metal chelating activity assay and ( )-epicatechin for superoxide anion radical scavenging activity and metal chelating activity.