3-(4-nitrophenyl)-6-((e)-2-phenylethenyl)[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole (en)1,2,4-triazolo[3,4-b][1,3,4]thiadiazole, 3-(4-nitrophenyl)-6-(2-phenylethenyl)- (en)