Table 5.
Tyrosinase inhibitory activity of the studied compounds compared with kojic acid, IC50 values for the 2,2-diphenyl-1-picrylhydrazyl scavenging ability of the studied compounds and Percentage of the H2O2 scavenging activity of the studied compounds. Each value represents mean± SD (n = 3)
| Compound | IIIa | IIIb | IIIc | IIId | Kojic acid a | BHT | Galic acid |
|---|---|---|---|---|---|---|---|
| IC50 values for Tyrosinase inhibitory activity (mM)±SD | 0.4037±0.014 | 0.6172±0.019 | 0.6569±0.028 | 0.2169±0.009 | 0.3194±0.012 | NAb | NA |
| IC50 values for DPPH (µg/ml)±SD | 34.38±1.9 | 44.62±2.9 | 21.38±1.4 | 25.17±1.8 | NA | 49.19±1.7 | NA |
| H2O2 Scavenging (%)±SD | 63.70±1.49 | 64.97±0.96 | 67.20±1.14 | 61.77±1.16 | NA | 78.52±1.85 | 97.39±0.76 |
a
positive control used in the assay
b
Not analyzed