InChI=1S/C21H20O11/c22-12-9-6-11(31-21-17(27)14(24)16(26)19(32-21)20(28)29)13(23)15(25)18(9)30-7-10(12)8-4-2-1-3-5-8/h1-6,10,14,16-17,19,21,23-27H,7H2,(H,28,29)