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