Table 4.
Antioxidant capacity of compounds 9–11 and 15–20 towards DPPH• in acetonitrile a.
| Entry | Antiox. | rIC50 (molsantiox./molsDPPH∙) | N° DPPH• Reduced b |
|---|---|---|---|
| 1 | Trolox | 0.22 | 2.24 |
| 2 | 9 | 4.26 | 0.12 |
| 3 | 10 | 4.12 | 0.12 |
| 4 | 11 | 3.92 | 0.13 |
| 5 | 15 | 1.69 | 0.30 |
| 6 | 16 | 4.47 | 0.11 |
| 7 | 17 | 3.25 | 0.15 |
| 8 | 18 | 0.54 | 0.93 |
| 9 | 19 | 2.23 | 0.22 |
| 10 | 20 | 0.17 | 3.02 |
a All the measures were performed in triplicate and the values were reported as mean ± SD; b The number of DPPH• molecules, reduced by one molecule of antioxidant, is the inverse of the stoichiometry.