1,3-Naphthalenedisulfonic acid, 7,7'-[[1,1'-biphenyl]-4,4'-diylbis(sulfonylimino)]bis- 144790-60-3 (TETRASODIUM SALT) 4,4'-Biphenbis-1,3diSO3H-Naphth-7NHSO2 AIDS-004874 AIDS004874