شوائب ثنائي ميثيل البيبرازين أبيماسيكليب

N,N'-((piperazine-1,4-diylbis(methylene))bis(pyridine-5,2-diyl))bis(5-fluoro-4-(4-fluoro-1-isopropyl-2-methyl-1H-benzo[d]imidazol-6-yl)pyrimidin-2-amine) ; N,N'-(5,5'-(piperazine-1,4-diylbis(methylene))bis(pyridine-5,2-diyl))bis(5-fluoro-4-(4-fluoro-1-isopropyl-2-methyl-1H-benzo[d]imidazol-6-yl)pyrimidin-2-amine) ; Abemaciclib Piperazine Dimer Impurity