RK-682 (calcium salt)

An inhibitor of the PTPs that blocks phosphorylation of CD45 and VHR (IC50s = 54 and 2 µM, respectively) and arrests cell cycle progress at the G1/S transition; also inhibits heparanase (IC50 = 17 µM), an endo-β-D-glucuronidase involved in tumor cell invasion and angiogenesis