1,1-DIMETHYLETHYL 4-(6-((8-CYCLOPENTYL-6-ETHENYL-7,8-DIHYDRO-5-METHYL-7-OXOPYRIDO(2,3-D)PYRIMIDIN-2-YL)AMINO)-3-PYRIDINYL)-1-PIPERAZINECARBOXYLATE
1,1-dimethylethyl 4-(6-((8-cyclopentyl-6-ethenyl-7,8-dihydro-5-methyl-7-oxopyrido(2,3-d)pyrimidin-2-yl)amino)-3-pyridinyl)-1-piperazinecarboxylate