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Table 3 Antioxidant activity of newly synthesized derivatives (S1–S18)

From: Synthesis of thiophene derivatives and their anti-microbial, antioxidant, anticorrosion and anticancer activity

Compound % Inhibition IC50
25 µg/ml 50 µg/ml 75 µg/ml 100 µg/ml
S1 25.62 30.56 51.34 67.28 73.31
S2 32.47 47.61 64.92 78.52 53.12
S3 23.26 47.52 59.68 72.69 61.35
S 4 35.68 52.23 65.38 78.63 48.45
S5 23.02 39.65 56.32 70.23 66.77
S 6 36.62 54.63 67.82 82.63 45.33
S7 33.21 48.62 64.65 81.62 51.61
S8 15.63 32.63 44.65 66.65 73.66
S9 15.62 25.63 46.69 59.63 79.77
S10 16.53 27.58 47.25 72.35 59.01
S11 21.03 33.65 48.56 75.62 69.96
S12 15.71 32.56 44.62 65.54 76.17
S13 21.25 35.62 56.28 69.58 69.07
S14 21.68 38.91 56.74 70.73 67.11
S15 25.32 30.56 52.36 67.23 72.90
S16 21.72 36.39 58.65 72.36 66.47
S17 31.58 47.54 63.25 78.65 54.19
S18 17.63 23.56 45.63 75.63 53.05
Ascorbic acid 37.62 56.63 67.82 85.63 43.35
  1. Obs. minimum inhibition concentration at 50% (IC50) in last column is showed in italics