InChI=1S/C18H15BrN4O5/c19-11-4-8(9(18(27)28)6-14(24)25)3-10(15(11)26)17-22-12-2-1-7(16(20)21)5-13(12)23-17/h1-5,9,26H,6H2,(H3,20,21)(H,22,23)(H,24,25)(H,27,28)/p-2/t9-/m1/s1