InChI=1S/C20H20O13S/c21-11(5-4-9-2-1-3-10(6-9)33-34(28,29)30)15-12(22)7-13(23)19(17(15)26)32-20-18(27)16(25)14(24)8-31-20/h1-7,14,16,18,20,22-27H,8H2,(H,28,29,30)