InChI=1S/C20H18O11S/c1-20(2)14(31-32(26,27)28)5-9-3-8(4-12(22)19(9)30-20)10-7-29-13-6-11(21)17(24)18(25)15(13)16(10)23/h3-4,6-7,14,21-22,24-25H,5H2,1-2H3,(H,26,27,28)