InChI=1S/C20H20O17S/c21-5-12-14(27)17(35-18(29)6-1-8(22)13(26)9(23)2-6)15(28)20(34-12)36-19(30)7-3-10(24)16(11(25)4-7)37-38(31,32)33/h1-4,12,14-15,17,20-28H,5H2,(H,31,32,33)