4-(9-cyclopentyl-7,7-difluoro-5-methyl-6-oxo-6,7,8,9-tetrahydro-5H-pyrimido[5,4-b][1,4]diazepin-2-ylamino)-2-fluoro-5-methoxy-N-(3-((4-methylpiperazin-1-yl)methyl)phenyl)benzamide