Learn about the importance of controlling impurities in Palbociclib synthesis. We discuss key impurities and why sourcing high-quality Tert-butyl 4-(6-((6-(1-Butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate is crucial.