InChI=1S/C20H18O13S/c21-9-3-1-8(2-4-9)13-5-10(22)15-14(31-13)6-11(23)18(16(15)25)32-20-17(26)19(12(24)7-30-20)33-34(27,28)29/h1-6,12,17,19-21,23-26H,7H2,(H,27,28,29)