1,7-Naphthalenedisulfonic acid, 4,4'-[carbonylbis[imino(1-methyl-1H-pyrrole-4,2-diyl)carbonylimino(1-methyl-1H-pyrrole-4,2-diyl)carbonylimino]]bis- 208576-37-8 AIDS-030697 AIDS030697 NSC651016 (TETRASODIUM SALT) Naphthalenedisulfonic acid der.