InChI=1S/C21H18O12/c22-9-4-2-1-3-7(9)8-6-31-10-5-11(14(24)15(25)12(10)13(8)23)32-21-18(28)16(26)17(27)19(33-21)20(29)30/h1-6,16-19,21-22,24-28H,(H,29,30)