Compound Concentration ( µg mL-1)
25 50 75 100 IC50
4a 56.21± 0.76 57.15± 0.62 59.75± 0.65 60.20± 0.94 22.23± 0.30
4b 54.32± 0.27 55.35± 0.93 57.25± 0.07 61.16± 0.97 23.01± 1.41
4c 59.35± 0.25 60.34± 0.18 62.46± 0.16 64.16± 0.72 21.06± 1.23
4d
4e 58.29± 0.64 62.24± 0.96 64.54±1.08 68.72± 0.98 21.44± 0.33
4f 64.29± 0.27 65.26± 0.17 66.72± 0.23 67.14± 0.10 19.44± 0.14
4g 62.35± 0.10 62.66± 0.36 63.49± 0.89 69.14± 1.06 20.04± 1.18
4h
4i 64.32± 0.09 66.13± 0.20 67.14± 0.61 72.14± 0.02 19.43± 0.08
4j 65.45± 0.22 68.29± 0.92 70.39± 0.12 73.28± 0.90 19.09± 0.09
Ascorbic acid 68.04± 0.18 71.24± 0.15 72.43± 0.22 75.29± 0.03 18.37± 0.04
Blank
(−) showed no scavenging activity. Values were the means of three replicates± SD
Table 2: The in vitro antioxidant activity of (4a–j) in DPPH method