3-allyl-2-[[4,5-diphenyl-3-(4-sulphonatobutyl)thiazol-2(3H)-ylidene]methyl]-5-[(1-ethylquinolin-4(1H)-ylidene)ethylidene]-4-oxothiazolium

2-[[4,5-Diphenyl-3-(4-sulfonatobutyl)thiazol-2(3H)-ylidene]methyl]-5-[2-(1-ethylquinolin-4(1H)-ylidene)ethylidene]-4-oxo-3-allyl-2-thiazolin-3-ium