InChI=1S/C20H26O16S/c21-10-3-1-9(5-11(10)22)2-4-13(23)36-18-16(26)15(25)14(24)12(35-18)6-32-19-17(27)20(28,7-33-19)8-34-37(29,30)31/h1-5,12,14-19,21-22,24-28H,6-8H2,(H,29,30,31)/b4-2+