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LY2835219 is a selective and orally available dual cyclin-dependent kinases 4/6 (CDK4/6) inhibitor that potently inhibits the activities of CDK4 and CDK6 with the half maximal inhibition concentration IC50 values of 2 nM and 10 nM respectively [1].

LY2835219 has also been found to inhibit Rb phosphorylation both in vivo and in vitro leading to specific cell arrest at G1 phase as well as the inhibition of tumor growth [1].

Since the blood brain barrier (BBB) is a major obstacle for the effective treatment of primary brain tumors and brain metastases, LY2835219, which is able to cross the BBB, has the potential to inhibit intracranial tumor growth alone or in combination with other agents [1].

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