InChI=1S/C21H26O14/c22-7-10-12(24)13(25)16(28)20(33-10)32-9-4-2-1-3-8(9)5-6-11(23)34-21-17(29)14(26)15(27)18(35-21)19(30)31/h1-6,10,12-18,20-22,24-29H,7H2,(H,30,31)/b6-5+