| Extracts and standard substance | Total phenolic content (mg GAE g−1 extract) | DPPH EC50 |
| PFE | 10.6 ± 0.1 | 299.4 ± 1.5 |
| PFH | 7.7 ± 0.6 | 1439.4 ± 2.7 |
| PFAE | 11.4 ± 0.3 | 391.8 ± 0.9 |
| Ascorbic acid | - | 2.05 ± 0.02 |