InChI=1S/C21H20O12/c22-9-2-1-6-16-8(7-3-10(23)11(24)4-12(7)31-16)5-30-17(6)18(9)32-21-15(27)13(25)14(26)19(33-21)20(28)29/h1-4,8,13-16,19,21-27H,5H2,(H,28,29)