一种强力的有选择性的周期蛋白依赖性激酶(CDKs)抑制剂。SU9516 is a 3-substituted indolinone compound displaying anti-proliferative and proapoptotic properties in tumor cells. SU9516 displays activity as a selectively potent ATP-competitive inhibitor of CDKs. It also shows no significant effect (IC50 >10 μM) on the activities of PKC, p38, PDGFRβ, or EGFR. SU9516 has an Inhibitory effect on proliferation of growth-factor stimulated colon carcinoma cells by binding to Cdk2 and preventing the phosphorylation of pRb and its dissociation from E2F. SU9516 is an inhibitor of Cdc2, Cdk2 and Cdk4.