PHA-848125 is an ATP-competitive inhibitor of cyclin-dependent kinases (Cdks) that potently inhibits Cdk2/cyclin A (IC50 = 45 nM). It is at least 3-fold less potent at Cdks 1, 3, 4, 5, and 7. PHA-848125 is orally available and displays efficacy in suppressing the growth of cancer cells or tumor xenografts in animals.