AIDS-004760 AIDS004760 Ethyl bis-distamycin Ethyl 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} NSC646025