3-(4-ethoxyphenyl)-6-propyl-5,6-dihydro[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-ethoxyphenyl)-5,6-dihydro-6-propyl- (en)