Fig. 8
The relationship between final concentration and the ratio of scavenging hydroxyl radicals. The IC50 values of hydroxyl free radical scavenging capacity of isoeugenol, shikonin, baicalein, rosmarinic acid, and dihydromyricetin were respectively 32.5 μmol/L, 18.3 μmol/L, 11.6 μmol/L, 8.3 μmol/L, and 4.2 μmol/L (n = 3, P < 0.05)