Luvixasertib (CFI-402257) is an inhibitor of threonine tyrosine kinase (TTK) with IC50 of 1.7 nM and Ki of 0.1 nM, respectively. It is a potential therapeutic for treating hepatocellular carcinoma that works directly by inhibiting cell-cycle checkpoints in cancer cells and indirectly by mobilizing immune cells from the tumor microenvironment.