InChI=1S/C21H26O14/c22-11(32-7-10-12(23)13(24)16(27)20(31)34-10)6-3-8-1-4-9(5-2-8)33-21-17(28)14(25)15(26)18(35-21)19(29)30/h1-6,10,12-18,20-21,23-28,31H,7H2,(H,29,30)/b6-3+