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