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