The chemical Abemaciclib mesylate has a known molecular formula of C27-H32-F2-N8.C-H4-O3-S. Synonyms may include: UNII-KKT462Q807, 2-Pyrimidinamine, N-(5-((4-ethyl-1-piperazinyl)methyl)-2-pyridinyl)-5-fluoro-4-(4-fluoro-2-methyl-1-(1-methylethyl)-1H-benzimidazol-6-yl)-, methanesulfonate (1:1), LY-2835219 methanesulfonate (ChemID).