Table 1 The IC50 values of flavonoids
| Â | Isoeugenol | Shikonin | Baicalein | Rosmarinic acid | Dihydromyricetin |
|---|---|---|---|---|---|
Tyrosinase diphenolase activity (μmol/L) | 33.33 | 26.67 | 13.33 | 6.67 | 3.33 |
DPPH free radical (μmol/L) | 101.6 | 83.2 | 58.6 | 28.5 | 12.4 |
ABTS free radical (μmol/L) | 36.36 | 27.27 | 9.09 | 6.82 | 3.41 |
Hydroxyl free radical (μmol/L) | 32.5 | 18.3 | 11.6 | 8.3 | 4.2 |
Superoxide free radical (μmol/L) | 38.2 | 31.5 | 16.1 | 12.3 | 7.6 |
Lipid peroxidation (μmol/L) | 25.1 | 16.67 | 12.5 | 8.33 | 6.25 |