Table 2.
Antioxidant activity of the compounds through DPPH and FRAP test. Each value was obtained from three different experiments (mean ± SEM). (The caffeic acid value of the DPPH test refers to a tested concentration equal to 0.0105 mg/mL).
| Compound | DPPH (% Inhibition) |
DPPH IC50 (µg/mL) |
FRAP (µmolTE/g) |
|---|---|---|---|
| Caffeic acid | 81.35 ± 0.35 | - | 10156.12 ± 15.5 |
| PBSA | <LOQ * | - | <LOQ * |
| 7 | 53.88 ± 2.30 | 1093.09 ± 8.65 | 239.91 ± 1.79 |
| 10 | 70.00 ± 3.25 | 64.10 ± 3.21 | 1085.57 ± 0.88 |
| 13 | 33.00 ± 1.28 | - | 108.89 ± 2.98 |
| 8 | 10.96 ± 0.56 | - | <LOQ * |
| 11 | 15.46 ± 0.98 | - | 4462.64 ± 18.29 |
| 14 | 52.06 ± 1.48 | 1416.38 ± 21.40 | 26.67 ± 2.89 |
| 9 | 12.52 ± 0.88 | - | 82.16 ± 0.22 |
| 12 | 35.05 ± 0.87 | - | 75.89 ± 5.43 |
| 15 | 30.23 ± 1.45 | - | 181.84 ± 2.66 |
* LOQ, Limit of Quantification.