Fig. 6
The relationship between final concentration and the ratio of scavenging DPPH radicals. The IC50 values of DPPH free radical scavenging capacity of isoeugenol, shikonin, baicalein, rosmarinic acid, and dihydromyricetin were respectively 101.6 μmol/L, 83.2 μmol/L, 58.6 μmol/L, 28.5 μmol/L, and 12.4 μmol/L (n = 3, P < 0.05). DPPH 1,1-diphenyl-2-picrylhydrazyl