Abstract Introduction Materials and Methods Chemicals Materials Plant materials and preparation of extracts The amounts of phenolic compounds and flavonoids Scavenging activity on DPPH radicals Superoxide anion radical (O₂) scavenging activity Metal chelating activity Nitric oxide (NO) scavenging activity Reducing power Superoxid dismutase (SOD) activity Statistical analysis Results and Discussion The amounts of phenolic compounds and flavonoids Superoxide anion radical (O₂) scavenging activity Metal chelating activity NO scavenging activity Reducing power SOD activity References