InChI=1S/C20H18O12S/c21-10-6-13(9-4-2-1-3-5-9)30-14-7-11(22)18(17(25)15(10)14)31-20-19(32-33(26,27)28)16(24)12(23)8-29-20/h1-7,12,16,19-20,22-25H,8H2,(H,26,27,28)