2-(3-(3-Ethyl-5-methyl-2-benzothiazolinylidene)-2-(2-furyl)-1-propenyl)-1-(3-sulfopropyl)naphtho(1,2-d)thiazolium, hydroxide, inner salt 68239-17-8 Naphtho(1,2-d)thiazolium, 2-(3-(3-ethyl-5-methyl-2(3H)-benzothiazolylidene)-2-(2-furanyl)-1-propenyl)-1-(3-sulfopropyl)-, inner salt