Synonyms: Thiazolium,3-ethyl-2-[(3-ethyl-4,5-diphenyl-2(3H)-thiazolylidene)methyl]-5-[2-(3-ethyl-6,7,8,9-tetrahydronaphtho[2,1-d]thiazol-2(3H)-ylidene)-1-(2-thienyl)ethylidene]-4,5-dihydro-4-oxo-,iodide (9CI); Naphtho[2,1-d]thiazole, thiazolium deriv.