InChI=1/C15H9BrN4O4/c16-9-4-5-12-11(7-9)13(15(22)17-12)18-19-14(21)8-2-1-3-10(6-8)20(23)24/h1-7H,(H,19,21)(H,17,18,22)/p+1/fC15H10BrN4O4/h17-19H/q+1 E8F1B4CBAEF3F2D3