AIDS-004761 AIDS004761 Hexyl bis-distamycin Hexyl bis{N-[5-[[(amino-3-iminopropyl)amino]carbonyl]-1-methyl-1H-pyrrol-3-yl-4-[[(4-(formylamino)-1-methyl-1H-pyrrol-2yl]carbonyl]amino]-1H-pyrrole-2-carboxamide} NSC646026