To assess the nature of the cancer cell death-inducing effect of the drugs compound 1 (PT162, NSC 796018), compound 2 (PT166, NSC 750423), and compound 3 (PT167, NSC 799315), and to verify the failure to induce cancer cell death of compound 2, the cellular compartment of cytochrome c in the prostate cancer cell lines PC-3 and DU-145 under the action of compound 1, compound 2, and compound 3 was investigated (Figure 21). Here, CYCS is linked to prostate cancer.