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

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