6-(o-Nitrophenyl)-2-(3,4,5-trimethoxyphenyl)imidazo(2,1-b)-1,3,4-thiadiazole 91918-55-7 Imidazo(2,1-b)-1,3,4-thiadiazole, 6-(o-nitrophenyl)-2-(3,4,5-trimethoxyphenyl)-