Figure 6.

In vitro toxicity of bivalent naphthalimide analog series. PC12 cells were incubated in the absence (control) or presence of 100 μmol/L of each analog for 72 h. The average control cell count per well was considered 100% viability. Each analog‐treated sample is represented by the average percentage of the control cell count. Standard error of the mean count is shown with error bars (n = 3). Treatment of PC12 cells with the analogs shown no significant difference in cell count (P > 0.05) implicating no toxic effect of the analogs in vitro.