InChI=1S/C18H14Br8O4S/c19-5-9(21)7-29-17-13(23)1-11(2-14(17)24)31(27,28)12-3-15(25)18(16(26)4-12)30-8-10(22)6-20/h1-4,9-10H,5-8H2