InChI=1/C21H18BrNO4S/c22-18-10-6-16(7-11-18)17-8-12-19(13-9-17)28(26,27)23-20(21(24)25)14-15-4-2-1-3-5-15/h1-13,20,23H,14H2,(H,24,25)/p-1/t20-/m0/s1/fC21H17BrNO4S/q-1 18ECAB13F59FADF1