2-[3-(5-Chloro-3-methyl-2-benzothiazolinylidene)-2-[(4-sulfobutyl)thio]propenyl]-3-ethylbenzothiazoliumhydroxide, inner salt (7CI); Benzothiazolium,2-[3-(5-chloro-3-methyl-2-benzothiazolinylidene)-2-[(4-sulfobutyl)thio]propenyl]-3-ethyl-,hydroxide, inner salt (8CI); Benzothiazolium,5-chloro-2-[3-(3-ethyl-2(3H)-benzothiazolylidene)-2-[(4-sulfobutyl)thio]-1-propenyl]-3-methyl-,inner salt (9CI)