InChI=1/C19H16BrN3O4/c20-16-11-14(23(25)26)8-9-17(16)22-19(24)18(13-5-2-1-3-6-13)21-12-15-7-4-10-27-15/h1-11,18,21H,12H2,(H,22,24)/t18-/m1/s1/f/h22H 5B641E48438B4193