UMI-77 is a novel, selective, Mcl-1 SMI inhibitor. UMI-77 is selective for Mcl-1 over other members of the antiapoptotic Bcl-2 family with a Ki of 490 nM. UMI-77 acts by binding to the BH3-binding groove of Mcl-1, blocking the heterodimerization of Mcl-1/Bax and Mcl-1/Bak. It inhibits cell growth and induces apoptosis in pancreatic cancer cells. MW: 468.34. Purity ≥98% by HPLC