3-Ethyl-2-(3-(3-ethylnaphtho(2,3-d)thiazol-2(3H)-ylidene)-1-propenyl)naphtho(2,3-d)thiazolium salt with 4-methylbenzenesulfonic acid (1:1) 51943-57-8 Naphtho(2,3-d)thiazolium, 3-ethyl-2-(3-(3-ethylnaphtho(2,3-d)thiazol-2(3H)-ylidene)-1-propenyl)-, salt with 4-methylbenzenesulfonic acid (1:1)