4-Acridinecarboxamide, 9,10-dihydro-N-[2-(dimethylamino)ethyl]- 1-[[3-[(methyl)[3-[[2-[2-(dimethylamino)ethyl]- 1,3,7-trioxo-1H,7H-pyrimido[5,6,1-de]acridin- 6-yl]amino]propyl]amino]propyl]amino]-9-oxo- NSC710560