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DPPH radical scavenging activity (%) of isolated compounds and curcumin (Cur., positive control).
| DPPH Scavenging Activity | ||
|---|---|---|
| Samples | Conc. (μM) | Rate (%) |
| Cur. | 200 | 62.4 ± 1.0 |
| 1 | 200 | 5.2 ± 0.2 |
| 2 | 200 | 5.8 ± 0.8 |
| 4 | 200 | 21.3 ± 2.5 |
| 7 | 400 | −1.2 ± 1.7 |
| 8 | 400 | −0.1 ± 0.8 |
