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DPPH free-radical-scavenging of compounds 1-19 a .
| Sample | DPPH inhibition rate (%) | IC50 (μmol/L) |
|---|---|---|
| 1 | 43.21 | — |
| 2 | 90.02 | 59.13 ± 2 |
| 3 | 15.88 | — |
| 4 | 18.82 | — |
| 5 | 4.19 | — |
| 6 | 10.34 | — |
| 7 | 18.62 | — |
| 8 | 8.84 | — |
| 10 | 6.22 | — |
| 11 | 36.17 | — |
| 12 | 2.78 | — |
| 13 | 2.45 | — |
| 17 | 2.45 | — |
| 18 | 2.45 | — |
| 19 | 80.36 | 363.77 ± 3 |
| Ascorbic acid | 90.69 | 101.67 ± 0.2 |
Compounds that are not shown in this table did not exhibit activity.
