2-Naphthalenesulfonic acid, 7,7'-[(3,3'-dimethoxy- [1, 1'-biphenyl]-4,4'-diyl)bis(azo)]bis[6-hydroxy- 2-Naphthalenesulfonic acid, {7,7'-[(3,3'-dimethoxy-} {[1,} {1'-biphenyl]-4,4'-diyl)bis(azo)]bis[6-hydroxy-,} disodium salt AIDS-156886 AIDS156886 NSC632483 (DISODIUM SALT)