InChI=1S/C21H16Br4O6S/c1-9-12(7-14(22)19(26)17(9)24)21(28,11-5-3-4-6-16(11)32(29,30)31)13-8-15(23)20(27)18(25)10(13)2/h3-8,26-28H,1-2H3,(H,29,30,31)