Synonyms: Naphtho(1,2-d)thiazolium, 2-(2-(acetylphenylamino)ethenyl)-1-ethyl-, 4-methylbenzenesulfonate (1:1);1-Ethyl-2-(2-(2-(phenylacetylamino))ethenyl)naphtho(1,2-d)thiazolium, 4-methylbenzenesulfonate;3-Ethyl-2-(2-(N-(phenyl)acetylamino)ethenyl)naphtho(1,2-d)thiazolium,4-methylbenzenesulfonate;2-(2-(Acetylanilino)vinyl)-1-ethylnaphtho(1,2-d)thiazolium, salt with toluene-p-sulphonic acid (1:1);Naphtho(1,2-d)thiazolium, 2-(2-(acetylphenylamino)ethenyl)-1-ethyl-, salt with 4-methylbenzenesulfonic acid (1:1);2-{(E)-2-[acetyl(phenyl)amino]ethenyl}-1-ethylnaphtho[1,2-d][1,3]thiazol-1-ium 4-methylbenzenesulfonate