InChI=1S/C22H30O13/c1-31-8-2-3-10-4-6-11(7-5-10)32-22-17(28)18(13(24)12(9-23)33-22)34-21-16(27)14(25)15(26)19(35-21)20(29)30/h2-7,12-19,21-28H,8-9H2,1H3,(H,29,30)/b3-2+