InChI=1/C18H13BrN4O5/c19-10-3-1-2-9(4-10)16-21-15(28-22-16)7-23-17(24)11-5-13-14(27-8-26-13)6-12(11)20-18(23)25/h1-6,15H,7-8H2,(H,20,25)(H,21,22)/t15-/m1/s1/f/h20-21H 67BF21929AE1555C