Potent and selective Bcl-2 family inhibitor / BH3 domain mimetic which binds to Bcl-2, Bcl-xL and Bcl-w (Ki<1 nM). A useful tool compound which has shown interesting results in various cancer clinical trials2. Synergizes with deoxyglucose and other agents, inducing apoptosis in cancer cells in a xenograft mouse model3. A novel senolytic agent, inducing apoptosis preferentially in senescent cells in a cell type-restricted manner4.