Synonyms: Thiazolium,2-[[4,5-diphenyl-3-(4-sulfobutyl)-2(3H)-thiazolylidene]methyl]-5-[(3-ethyl-2(3H)-benzothiazolylidene)ethylidene]-4,5-dihydro-4-oxo-3-(2-propenyl)-,hydroxide, inner salt; Thiazolium, 2-[[4,5-diphenyl-3-(4-sulfobutyl)-2(3H)-thiazolylidene]methyl]-5-[(3-ethyl-2(3H)-benzothiazolylidene)ethylidene]-4,5-dihydro-4-oxo-3-(2-propenyl)-,inner salt (9CI)