| Compound |
Concentration ( μg mL-1) |
| 25 |
50 |
75 |
100 |
IC50 |
| 4a |
57.29± 0.84 |
60.16± 0.72 |
62.24± 0.63 |
63.42± 0.94 |
21.81± 1.30 |
| 4b |
− |
− |
− |
− |
− |
| 4c |
63.40± 0.23 |
64.29± 0.19 |
65.19± 0.14 |
66.18± 0.78 |
19.71± 1.03 |
| 4d |
− |
− |
− |
− |
− |
| 4e |
64.10± 0.64 |
65.20± 0.96 |
67.20±1.08 |
69.14± 0.98 |
19.50± 0.64 |
| 4f |
62.32± 0.07 |
66.28± 0.07 |
69.25± 0.03 |
70.24± 0.10 |
20.05± 0.02 |
| 4g |
63.19± 0.10 |
65.26± 0.06 |
68.76± 0.89 |
71.24± 1.06 |
19.78± 0.18 |
| 4h |
62.28± 0.28 |
63.16± 0.17 |
64.26± 0.44 |
69.14± 1.26 |
20.07± 1.03 |
| 4i |
68.19± 0.06 |
69.14± 0.03 |
72.34± 0.06 |
76.14± 0.22 |
18.33± 0.09 |
| 4j |
66.27± 0.30 |
68.16± 0.62 |
71.32± 0.12 |
74.29± 0.40 |
18.86± 0.97 |
| Ascorbic acid |
69.24± 0.23 |
72.16± 0.02 |
76.29± 0.21 |
78.31± 0.15 |
18.05± 0.05 |
| Blank |
− |
− |
− |
− |
− |
|
| (−) showed no scavenging activity. Values were the means of three replicates± SD |
| Table 3: The in vitro antioxidant activity (4a–j) in NO method. |