Synonyms: Naphtho(1,2-d)thiazolium, 1-ethyl-2-(3-(1-ethylnaphtho(1,2-d)thiazol-2(1H)-ylidene)-2-methyl-1-propen-1-yl)-, 4-methylbenzenesulfonate (1:1);1-Ethyl-2-(3-(1-ethylnaphtho(1,2-d)thiazol-2(1H)-ylidene)-2-methyl-1-propenyl)naphtho(1,2-d)thiazolium toluene-p-sulphonate;Naphtho(1,2-d)thiazolium, 1-ethyl-2-(3-(1-ethylnaphtho(1,2-d)thiazol-2(1H)-ylidene)-2-methyl-1-propenyl)-, salt with 4-methylbenzenesulfonic acid (1:1);1-ethyl-2-[3-(1-ethylnaphtho[1,2-d][1,3]thiazol-2(1H)-ylidene)-2-methylprop-1-en-1-yl]naphtho[1,2-d][1,3]thiazol-1-ium 4-methylbenzenesulfonate;1-ethyl-2-[(1Z,3Z)-3-(1-ethylnaphtho[1,2-d][1,3]thiazol-2(1H)-ylidene)-2-methylprop-1-en-1-yl]naphtho[1,2-d][1,3]thiazol-1-ium bromide