8-CYCLOPENTYL-7,8-DIHYDRO-5-METHYL-7-OXO-2-((5-(1-PIPERAZINYL)-2-PYRIDINYL)AMINO)PYRIDO(2,3-D)PYRIMIDINE-6-ACETALDEHYDE
8-cyclopentyl-7,8-dihydro-5-methyl-7-oxo-2-((5-(1-piperazinyl)-2-pyridinyl)amino)pyrido(2,3-d)pyrimidine-6-acetaldehyde