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Table 2 The DPPH scavenging ability (%) of derivatives 5a–k at 2 mg/mL

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

Compound

Scavenging ability (%)

Compound

Scavenging ability (%)

5a

18.65 ± 0.43

5g

10.66 ± 0.19

5b

9.79 ± 0.30

5h

4.01 ± 0.24

5c

4.51 ± 0.36

5i

9.08 ± 0.13

5d

11.65 ± 0.19

5j

5.90 ± 0.24

5e

5.90 ± 0.24

5k

5.56 ± 0.19

5f

5.64 ± 0.32

  

Theophylline

12.14 ± 0.20

Vitamin C a

81.62 ± 0.21

  1. a0.04 mg/mL; Data are mean ± SD (n = 3, p < 0.05)