Potent and selective haspin kinase inhibitor (IC50 = 2 nM). Selective over 27 other protein kinases including Aurora B kinase. Induces cell cycle arrest at G2/M, inhibits cell proliferation and promotes apoptosis in multiple cancer cell lines. Inhibits angiogenesis ex vivo and attenuates tumor growth of HCT-116 xenografts in rats. Purity 98%. MW (observed): 406.36