By incorporating histone deacetylase (HDAC) inhibitory functionality into the pharmacophore of the epidermal growth factor receptor (EGFR) and human epidermal growth factor receptor 2 (HER2) inhibitors, we synthesized a novel series of compounds with potent, multiacting HDAC, EGFR, and HER2 inhibition and identified 7-(4-(3- ethynylphenylamino)-7-methoxyquinazolin-6-yloxy)-N-hydroxyheptanamide 8 (CUDC- ...