HDAC1/CDK7-IN-1 (compound 8e) serves as a dual inhibitor targeting both CDK7 and HDAC1, with IC50 values of 893 nM and 248 nM , respectively. This compound effectively suppresses the proliferation of various cancer cell lines, including MDA-MB-231, MCF-7, A549, and HCT-116. Additionally, it triggers cell cycle arrest and apoptosis in HCT-116 cells and impedes their migration [1].