Table 4.
Biological Activities of Compounds 1–4.
| Compound | Inhibitory ratio (%) | |
| HeLa | HepG-2 | |
| 1 | - | 6.3 |
| 2 | - | 25.1 |
| 3 | - | 9.2 |
| 4 | 4.0 | 16.1 |
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