InChI=1S/C21H23BrN2O8S2/c1-4-31-21(25)19-17(12-33(26,27)13-8-6-5-7-9-13)24(3)16-10-15(22)20(32-34(28,29)30)14(11-23-2)18(16)19/h5-10,23H,4,11-12H2,1-3H3,(H,28,29,30)/p-1