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