6-isopropyl-3-(3-nitrophenyl)-6,7-dihydro-5h-[1,2,4]triazolo[3,4-b][1,3,5]thiadiazine (en)5h-1,2,4-triazolo[3,4-b][1,3,5]thiadiazine, 6,7-dihydro-6-(1-methylethyl)-3-(3-nitrophenyl)- (en)