InChI=1/C12H11BrN4O3S/c1-7-4-3-5-9(15-7)16-11(18)10-8(13)6-14-12(17-10)21(2,19)20/h3-6H,1-2H3,(H,15,16,18)/f/h16H 6DCAA87A1856A7E9