4,4'-{Carbonylbis[imino(1-methyl-1H-pyrrole-4,2-diyl)carbonylimino(1-methyl-1H-pyrrole-4,2-diyl)carbonylimino(1-methyl-1H-pyrrole-4,2-diyl)carbonylimino]}dinaphthalene-1,7-disulfonic acid AIDS-072102 AIDS072102 NSC670886