InChI=1S/C21H18O12/c22-8-6-9-10(12(24)11(8)23)13(25)18(17(31-9)7-4-2-1-3-5-7)32-21-16(28)14(26)15(27)19(33-21)20(29)30/h1-6,14-16,19,21-24,26-28H,(H,29,30)