3-ethyl-2-[2-[(3-ethylnaphtho[2,3-d]thiazolin-2-ylidene)methyl]-1-butenyl]naphtho[2,3-d]thiazolium p-toluenesulphonate;Naphtho(2,3-d)thiazolium, 3-ethyl-2-(2-((3-ethylnaphtho(2,3-d)thiazoli n-2-ylidene)methyl)-1-butenyl)-, p-toluenesulfonate
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