CA IX/GPX4-IN-1 (Compound 22abcb) is a dual targeted inhibitor of CA IX and GPX4 activity. CA IX/GPX4-IN-1 can effectively kill SUM159PT cells (IC50 = 416 nM) by inducing iron death under hypoxic conditions. CA IX/GPX4-IN-1 has an IC50 of 663 nM to CA IX in SUM159PT-CAIX-FL cells. CA IX/GPX4-IN-1 can significantly inhibit tumor growth and can be reversed by ferroptosis inhibitors. CA IX/GPX4-IN-1 can be used for research on breast cancer and other cancers[1].