InChI=1/C13H13BrN2O4/c1-6(3-12(18)19)2-11(17)7-4-9-10(5-8(7)14)16-13(20)15-9/h4-6H,2-3H2,1H3,(H,18,19)(H2,15,16,20)/p-1/t6-/m1/s1/fC13H12BrN2O4/h15-16H/q-1 74E8D7B5B50C028E