InChI=1/C12H13BrN4O4/c1-12(2)10(20)17(11(21)16-12)5-8(18)15-7-3-6(13)4-14-9(7)19/h3-4H,5H2,1-2H3,(H,14,19)(H,15,18)(H,16,21)/f/h14-16H 8C964D626BF52FC5