Synonyms: Naphtho[1,2-d]thiazolium,2-[2-[[5,6-dimethyl-3-[3-(sulfooxy)propyl]-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-1-ethyl-,hydroxide, inner salt;Naphtho[1,2-d]thiazolium,2-[2-[[5,6-dimethyl-3-[3-(sulfooxy)propyl]-2(3H)-benzothiazolylidene]methyl]-1-butenyl]-1-ethyl-,inner salt (9CI);Naphtho[1,2-d]thiazolium,2-[2-[[5,6-dimethyl-3-[3-(sulfooxy)propyl]-2(3H)-benzothiazolylidene]methyl]-1-buten-1-yl]-1-ethyl-,inner salt;3-[2-[2-[(1-Ethylbenzo[e][1,3]benzothiazol-1-ium-2-yl)methylene]butylidene]-5,6-dimethyl-1,3-benzothiazol-3-yl]propyl sulfate;