Sabutoclax (BI-97C1) is a potent pan-inhibitor of anti-apoptotic Bcl-2 family proteins, including Bcl-xL, Bcl-2, Mcl-1, and Bfl-1. It has demonstrated pro-apoptotic activity in various cancer cell lines in vitro and has shown efficacy in xenograft tumor models in vivo, supporting its investigation in oncology research.