7-({4-[N-(6-{[4-(Acetylamino)phenyl]diazenyl}-5-hydroxy-7-sulfo(2-naphthyl))carbamoyl]phenyl}carbonylamino)-4-hydroxy-3-{[4-(hydroxycarbonylamino)phenyl]diazenyl}naphthalene-2-sulfonic acid AIDS-104461 AIDS104461