Table 2. In vitro toxicity of tacrine–neocryptolepines 1–3 and reference compound tacrine in HepG2 cells.

Comp	1 μM	10 μM	100 μM	300 μM
1	99.5 ± 0.7ns	37.2 ± 3.4***	33.8 ± 3.0***	34.8 ± 2.9***
2	40.9 ± 0.9***	34.9 ± 4.5***	36.2 ± 3.7***	36.5 ± 4.0***
3	78.1 ± 2.3*	41.4 ± 4.6***	38.4 ± 3.3***	37.9 ± 1.9***
Tacrine	93.4 ± 4.7ns	88.7 ± 3.4ns	64.3 ± 4.5***	40.0 ± 2.2***