8-CYCLOPENTYL-6-(1-HYDROXYETHYL)-5-METHYL-2-((5-(1-PIPERAZINYL)-2-PYRIDINYL)AMINO)PYRIDO(2,3-D)PYRIMIDIN-7(8H)-ONE
8-cyclopentyl-6-(1-hydroxyethyl)-5-methyl-2-((5-(1-piperazinyl)-2-pyridinyl)amino)pyrido(2,3-d)pyrimidin-7(8h)-one