OTS514, a thieno[2,3-c]quinolone compound, is a highly potent TOPK inhibitor with an IC50 value of 2.6 nM. The compound can inhibit TOPK kinase activity.
HI-TOPK-032 is a potent and selective TOPK inhibitor. In vitro, HI-TOPK-032 strongly suppressed TOPK kinase activity but had little effect on extracellular signal-regulated kinase 1 (ERK1), c-jun-NH2-kinase 1, or p38 kinase activities.