Synonyms: 1,3,6-Naphthalenetrisulfonicacid,7-[[2-(acetylamino)-4-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]phenyl]azo]-,trisodium salt (9CI); 1,3,6-Naphthalenetrisulfonic acid,7-[[2-acetamido-4-(2,3-dichloro-6-quinoxalinecarboxamido)phenyl]azo]-,trisodium salt (7CI,8CI)