InChI=1/C13H11BrN2O4/c1-6-10(13(18)19)12(17)16-11(15-6)8-5-7(20-2)3-4-9(8)14/h3-5H,1-2H3,(H,18,19)(H,15,16,17)/p-1/fC13H10BrN2O4/h16H/q-1 B815F22C5DDCD28C