3-[[6-(azetidin-1-yl)-1-[[4-[[3-[2-(dimethylamino)ethoxy]-5-(trifluoromethyl)phenyl]carbamoyl]-2-[[1-[[4-[[3-[2-(dimethylamino)ethoxy]-5-(trifluoromethyl)phenyl]carbamoyl]-2-[[6-[2-methoxyethyl(methyl)amino]pyrimido[5,4-d]pyrimidin-4-yl]amino]phenyl]methyl]-6-thiomorpholin-4-ylpyrimido[5,4-d]pyrimidin-1-ium-4-yl]amino]phenyl]methyl]pyrimido[5,4-d]pyrimidin-1-ium-4-yl]amino]-N-[3-[2-(dimethylamino)ethoxy]-5-(trifluoromethyl)phenyl]-4-methylbenzamide