18420-56-9 3-Ethyl-2-(2-((3-ethylnaphtho(2,3-d)thiazolin-2-ylidene)methyl)-1-butenyl)naphtho(2,3-d)thiazolium p-toluenesulphonate EINECS 242-299-2 Naphtho(2,3-d)thiazolium, 3-ethyl-2-(2-((3-ethylnaphtho(2,3-d)thiazolin-2-ylidene)methyl)-1-butenyl)-, p-toluenesulfonate