InChI=1/C13H9BrN4O3/c14-10-2-1-9(20-10)11-17-13(21-18-11)12(19)16-7-8-3-5-15-6-4-8/h1-6H,7H2,(H,16,19)/f/h16H D8A0AFDBD3A3C2E0