Table 2.
Antioxidant activities (EC50 and GEAC in μg/mL) of extracts and some isolated compounds from Trifolium baccarinii.
| Extracts/compounds | DPPH free radical scavenging activity (EC50) | Gallic acid equivalent antioxidant capacity (GEAC) |
|---|---|---|
| MeOH extract | 98.26 ± 0.74a | 35.59 ± 0.63a |
| EtOAc extract | 105.13 ± 0.86b | 27.43 ± 1.01b |
| n-BuOH extract | 81.74 ± 0.98c | 46.14 ± 1.26c |
| 1 | 4.87 ± 0.43d | 101.77 ± 1.24d |
| 2 | 6.39 ± 0.62e | 77.91 ± 0.59e |
| 3 | 8.02 ± 1.16e | 68.30 ± 0.71f |
| 4 | 3.71 ± 0.99d | 118.71 ± 0.19g |
| 5 | 11.58 ± 0.73f | 61.05 ± 0.90h |
| 6 | 7.13 ± 0.97e | 72.96 ± 1.54i |
| 8 | 38.96 ± 1.54g | 57.43 ± 0.97j |
| Vitamin C | 1.81 ± 0.19h | / |
EC50: equivalent concentrations of test samples scavenging 50% of DPPH radical; /: not determined. Data represent the mean ± SD of three independent experiments carried out in triplicate. In the same column, values earmarked by different superscript letters (a–j) are significantly different according to one-way ANOVA and the Waller-Duncan test (p < 0.05).