Used in research to study cell cycle regulation, particularly in cancer. Acts as a selective inhibitor of cyclin-dependent kinases (CDKs), helping to block the progression of cells from G1 to S phase. This makes it valuable in investigating anti-tumor mechanisms and developing targeted cancer therapies. Commonly applied in in vitro models to assess effects on proliferation and apoptosis in various cancer cell lines. Also used in combination studies with other anticancer agents to evaluate synergistic effects.