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