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Table 3 The DPPH scavenging ability (%) at 2 mg/mL and EC50 (mg/mL) of 6a–k

From: Synthesis and biological evaluation of the new 1,3-dimethylxanthine derivatives with thiazolidine-4-one scaffold

Compound Scavenging ability (%) Compound Scavenging ability (%)
6a 27.99 ± 0.49 6g 35.05 ± 0.32
6b 13.11 ± 0.12 6h 24.60 ± 0.31
6c 77.53 ± 0.47a 6i 28.32 ± 0.18
6d 33.47 ± 0.42 6j 38.39 ± 0.28
6e 37.49 ± 0.45 6k 68.28 ± 0.19c
6f e 64.50 ± 0.59b   
Theophylline 12.14 ± 0.20 Vitamin C f 81.62 ± 0.21d
  1. Data are mean ± SD (n = 3, p < 0.05)
  2. EC50 (mg/mL): a 1.1640 ± 0.0123, b 0.2212 ± 0.0011, c 1.4389 ± 0.0130, d 0.0083 ± 0.0002, e 0.3 mg/mL; f 0.04 mg/mL