HDAC-IN-36 (compound 23 g) is an orally active and potent HDAC (histone deacetylase) inhibitor, with an IC 50 of 11.68 nM ( HDAC6 ). HDAC-IN-36 promotes apoptosis , autophagy and suppresses migration. HDAC-IN-36 shows anti-tumor and anti-metastatic activity, and can be used for breast cancer research.