BI-2563 is a small molecule compound with potential antitumor properties. It binds to Polo-like kinase 1 (Plk1) and inhibits its activity, resulting in mitotic arrest, interruption of cell division, and apoptosis in susceptible tumor cell populations. Plk1 is a serine/threonine-protein kinase that serves as a key regulator of several critical processes essential for mitosis and cytokinesis.