HDAC-IN-39 is a potent inhibitor of HDAC and is able to act on HDAC1, HDAC2 and HDAC3 with IC50 values of 1.07 µM, 1.47 µM and 2.27 µM, respectively. HDAC-IN-39 induces cell cycle arrest in G2/M phase and also significantly inhibits microtubule polymerization. HDAC-IN-39 exhibits good anticancer effects on HDAC-IN-39 exhibited good anti-cancer effects on drug-resistant cancer cells.