2-(3,5-Dimethoxy-4-ethoxyphenyl)-6-(o-nitrophenyl)imidazo(2,1-b)-1,3,4-thiadiazole 91918-68-2 Imidazo(2,1-b)-1,3,4-thiadiazole, 2-(3,5-dimethoxy-4-ethoxyphenyl)-6-(o-nitrophenyl)-