1,5-Naphthalenedisulfonic acid, 3,3'-[(3,3'-dimethoxy-[1, 1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-amino]- 1,5-Naphthalenedisulfonic acid, {3,3'-[(3,3'-dimethoxy-[1,} {1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-amino-,} tetrasodium salt AIDS-156888 AIDS156888 NSC632485 (TETRASODIUM SALT)