Tubulin/HDAC-IN-2 (Compound II-19k) is a dual inhibitor targeting Tubulin and HDAC, exhibiting IC50 values of 0.403 μM for HDAC1, 0.591 μM for HDAC2, 3.552 μM for HDAC3, and 0.459 μM for HDAC6. The compound induces G2 phase cell cycle arrest and promotes apoptosis. It effectively hampers the proliferation of both hematoma and solid tumor cells, diminishes tumor metastasis, and demonstrates tumor growth inhibition in a liver tumor allograft mouse model [1].