InChI=1/C12H15BrN4O4/c1-2-20-9-3-7(5-16-17-12(15)19)8(13)4-10(9)21-6-11(14)18/h3-5H,2,6H2,1H3,(H2,14,18)(H3,15,17,19)/b16-5+/f/h17H,14-15H2 05F0D2F9FC43A218