CCT007093 is a potent PPM1D inhibitor or WIP1 inhibitor that selectively reduces viability of human tumour cell lines. CCT007093 enhances liver regeneration and increases the survival rate of mice after major hepatectomy. CT007093 treatment appeares to promote apoptosis in breast cancer cells and skin transformed keratinocytes that ectopically expressed Wip1, demonstrating that the effect of CCT007093 differs based on the level of Wip1 expression. PPM1D is a potential therapeutic target in ovarian clear cell carcinomas.