Fig. 9From: The antityrosinase and antioxidant activities of flavonoids dominated by the number and location of phenolic hydroxyl groupsThe relationship between final concentration and the ratio of scavenging superoxide radicals. The IC50 values of superoxide free radical scavenging capacity of isoeugenol, shikonin, baicalein, rosmarinic acid, and dihydromyricetin were respectively 38.2 μmol/L, 31.5 μmol/L, 16.1 μmol/L, 12.3 μmol/L, and 7.6 μmol/L (n = 3, P < 0.05)Back to article page