InChI=1S/C20H18O13S/c21-7-13-15(24)17(26)20(31-13)32-19-16(25)14-11(23)5-9(22)6-12(14)30-18(19)8-2-1-3-10(4-8)33-34(27,28)29/h1-6,13,15,17,20-24,26H,7H2,(H,27,28,29)