InChI=1S/C21H18O12/c22-8-2-3-9-12(6-8)31-17(7-1-4-10(23)11(24)5-7)18(13(9)25)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)