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