InChI=1S/C20H18O17S/c21-6-1-4-9(14(26)11(6)23)10-5(2-7(22)12(24)15(10)27)19(29)36-16-13(25)8(3-34-18(4)28)35-20(30)17(16)37-38(31,32)33/h1-2,8,13,16-17,20-27,30H,3H2,(H,31,32,33)