BRD4/CK2-IN-1 is a small molecule inhibitor targeting BRD4 and CK2, with an IC50 of 180nM for BRD4 and 230nM for CK2. It inhibits the proliferation of MDA-MB-231 and MDA-MB-468 cells, inducing apoptosis and autophagy-related cell death. It can be used in triple-negative breast cancer research.