3-[(5,6-Dimethylbenzimidazol-2-yl)diazenyl]-7-[(N-{6-[(5,6-dimethylbenzimidazol-2-yl)diazenyl]-5-hydroxy-7-sulfo(2-naphthyl)}carbamoyl)carbonylamino]-4-hydroxynaphthalene-2-sulfonic acid AIDS-104511 AIDS104511