Tubulin/HDAC-IN-2 (Compound II-19k) is a dual inhibitor of Tubulin and HDAC , with an IC 50 of 0.403 μM, 0.591μM, 3.552μM, 0.459μM for HDAC1/2/3/6. Tubulin/HDAC-IN-2 blocks cell cycle arrest at G2 phase, induces cell apoptosis. Tubulin/HDAC-IN-2 inhibits the growth of hematoma and solid tumor cells, reduces tumor metastasis, and also inhibits tumor growth in a liver tumor allograft mouse model.