Tubulin polymerization-IN-85 (Compound C21) is a tubulin polymerization inhibitor (IC50 = 1.59 µM) targeting the colchicine binding site. Tubulin polymerization-IN-85 can cause cancer cells G2/M phase arrest and induce apoptosis. Tubulin polymerization-IN-85 downregulates the expression of Bcl-2, Bcl-xl, Mcl-1, Cyclin B1, cdc25, cdc2 protein and upregulates P53, P21, Bad and Bax levels. Tubulin polymerization-IN-85 can be used for the research of cancer, such as cervical cancer[1].