N-[5-[4-[4-[4-[4-tert-butyl-2-(methanesulfinamido)-6-[[4-methyl-3-[[6-(1,4-oxazepan-6-ylmethyl)pyrido[3,2-d]pyrimidin-4-yl]amino]benzoyl]amino]phenoxy]-2-methylbutan-2-yl]-2-[[4-methyl-3-[[6-[(1-methylpiperidin-4-yl)methyl]pyrido[3,2-d]pyrimidin-4-yl]amino]benzoyl]amino]-6-(methylsulfanylamino)phenoxy]-2-methylbutan-2-yl]-2-methoxy-3-(methylsulfanylamino)phenyl]-3-[[6-[(1-ethylpiperidin-4-yl)methyl]pyrido[3,2-d]pyrimidin-4-yl]amino]-4-methylbenzamide