| Compound |
Concentration ( μg mL-1) |
| 25 |
50 |
75 |
100 |
IC50 |
| 4a |
52.16 ± 0.14 |
54.29 ± 0.48 |
55.19 ± 0.63 |
57.29 ± 0.72 |
23.96 ± 0.82 |
| 4b |
53.24 ± 0.49 |
54.16 ± 0.51 |
56.28 ± 0.14 |
59.14 ± 0.33 |
23.47 ± 1.44 |
| 4c |
59.28 ± 0.42 |
60.24 ± 0.69 |
62.32 ± 0.14 |
64.18 ± 0.78 |
21.08 ± 0.23 |
| 4d |
51.20 ± 0.64 |
52.60 ± 0.44 |
54.39 ± 0.36 |
56.27 ± 0.94 |
24.41 ± 1.25 |
| 4e |
60.20 ± 0.45 |
61.14 ± 0.96 |
62.22 ±1.12 |
64.19 ± 0.38 |
20.76 ± 1.33 |
| 4f |
62.44 ± 0.24 |
64.27 ± 0.15 |
65.29 ± 0.56 |
68.19 ± 0.19 |
20.01 ± 0.20 |
| 4g |
64.33 ± 0.22 |
65.28 ± 0.15 |
67.19 ± 0.39 |
70.23 ± 1.14 |
19.43 ± 0.16 |
| 4h |
− |
− |
− |
− |
− |
| 4i |
69.35 ± 0.06 |
72.39 ± 0.23 |
73.14 ± 0.16 |
75.22 ± 0.24 |
18.02 ± 0.09 |
| 4j |
68.16 ± 0.20 |
70.19 ± 0.90 |
71.23 ± 0.22 |
74.28 ± 0.90 |
18.33 ± 0.10 |
| Ascorbic acid |
70.20 ± 0.12 |
72.14 ± 0.09 |
74.28 ± 0.14 |
76.14 ± 0.06 |
17.80 ± 0.08 |
| Blank |
− |
− |
− |
− |
− |
|
| (−) showed no scavenging activity. Values were the means of three replicates ± SD |
| Table 4: The in vitro antioxidant activity of (4a–j) in H2O2 method |