Table 2.
Antioxidative activities against DPPH and cytotoxic activities against two tumor cell lines of compounds (±)-1–(±)-4.
| Compounds | IC50 (μM) | ||
|---|---|---|---|
| DPPHa | SF-268b | HepG2b | |
| (+)-1 | 14.3 | >200 | >200 |
| (–)-1 | 18.5 | >200 | >200 |
| (+)-2 | 5.8 | >200 | >200 |
| (–)-2 | 23.5 | >200 | >200 |
| (+)-3 | 9.8 | >200 | >200 |
| (–)-3 | 24.9 | >200 | >200 |
| (+)-4 | 3.7 | 51.7 ± 2.8 | 49.9 ± 2.0 |
| (–)-4 | 6.1 | 97.3 ± 1.8 | 98.7 ± 1.0 |
| Vc | 23.0 | ||
| Taxol | 6.0 ± 0.3 | 11.1 ± 1.1 | |
a
Positive control: Vc.
b
Positive control: Taxol; The results were mean ±SD (SD = standard deviation).