Apoptosis inducer 22 (QR-5) is an apoptosis inducer with IC 50 values of 63.1 and 46.5 μM for colon cancer cell lines SW480 and HT29, respectively. Apoptosis inducer 22 induces apoptosis by inhibiting the Wnt/β-catenin axis in colon cancer cells. Apoptosis inducer 22 can be used in anti-colon cancer research.