AZD4320 is a dual BCL-2/BCL-xL inhibitor with reported IC50 values of 26 nM (KPUM-MS3), 17 nM (KPUM-UH1), and 170 nM (STR-428) in cellular assays. This small molecule is a research tool for studying apoptosis mechanisms and has been utilized in preclinical in vitro cancer models.