3-[[6-(benzylamino)-1-[[2-[[6-(benzylamino)-1-[[4-[[3-(2-cyanopropan-2-yl)phenyl]carbamoyl]-2-[[6-(2-methylpropylamino)pyrimido[5,4-d]pyrimidin-4-yl]amino]phenyl]methyl]pyrimido[5,4-d]pyrimidin-1-ium-4-yl]amino]-4-[(5-tert-butyl-1,2-oxazol-3-yl)carbamoyl]phenyl]methyl]pyrimido[5,4-d]pyrimidin-1-ium-4-yl]amino]-4-methyl-N-[4-(trifluoromethyl)pyridin-2-yl]benzamide