Table 1. Comparative cytotoxicities of the hydroxystilbenes against the human neuroblastoma cell lines^a.

Compound	% Viability loss – IMR32 cells		% Viability loss – SHSY-5Y cells
	25 μM	50 μM	50 μM	75 μM
1	44.5 ± 4.2*	60.0 ± 4.6**	41.3 ± 3.4*	55.9 ±3.9**
2	18.2 ± 2.6	23.7 ± 2.2*	13.2 ± 1.6	22.8 ± 1.9*
3	35.0 ± 2.3*	45.4 ± 4.1*	38.2 ± 4.1*	41.2 ± 3.6*
4	37.8 ± 3.9*	16.2 ± 2.8	27.7 ± 1.9*	40.9 ± 5.1*
5	23.7 ±1.6*	27.2 ± 2.8*	17.8 ± 1.4	23.0 ± 2.2*
Resv	27.2 ± 1.8*	42.8 ± 4.7*	30.0 ± 3.6*	47.6 ± 5.1**

^aThe cells were incubated with vehicle alone or in the presence of the hydroxystilbenes under complete growth conditions. The cell viability at 48 h was assayed by the MTT method. The percentages of reduction in viable cells were calculated considering the percentage of viable cells of the vehicle-treated control as 100. All determinations were made in five replicates in 3-4 different experiments and the values are mean ± S.E.M. ^*p<0.05, ^**p<0.01 compared to vehicle control.