PRE-CADASTRO Propoxyvinyl N-Boc Palbociclib (25 mg) (tert-Butyl 4-{6-[(6-(1-propoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino]pyridin-3-yl}piperazine-1-carboxylate)