Used in pharmaceutical research as a potent and selective inhibitor of BET bromodomains, particularly BRD4, making it a valuable tool compound in epigenetic studies. It modulates gene expression involved in inflammation, cancer progression, and cell proliferation. Commonly applied in oncology research for its ability to suppress tumor growth in models of leukemia, lymphoma, and solid tumors. Also utilized in studying inflammatory diseases and immune responses due to its regulatory effect on cytokine production. Its cell permeability and stability make it suitable for in vitro and in vivo assays.