CASP9 and cancer: EDA-71-mediated caspase 9 activation at a concentration of 1.5 μM was observed in 3.2 ± 0.6% (MCF-7) and 9.4 ± 0.9% (MDA-MB-231) of the cancer cell population, whereas a concentration of 3 μM of this tested compound resulted in an increase to 12.7 ± 2.2% and 17.2 ± 1.4% in MCF-7 and MDA-MB-231 cells, respectively.