2-Naphthalenesulfonic acid, 3,3'-(1,2-ethenediylbis((3-sulfo-4,1-phenylene)azo))bis(6-amino-4-hydroxy-, tetralithium salt 4,4'-Bis((7-amino-1-hydroxy-3-sulfo-2-naphthyl))azo-2,2'-stilbenedisulfonic acid, tetralithium salt 75701-33-6