2,2'-(2-ethoxyethene-1,1-diyl)bis(1,3-benzothiazole) InChI=1/C18H14N2OS2/c1-2-21-11-12(17-19-13-7-3-5-9-15(13)22-17)18-20-14-8-4-6-10-16(14)23-18/h3-11H,2H2,1H benzothiazole, 2,2'-(2-ethoxyethenylidene)bis-