InChI=1S/C21H18O12/c22-9-2-1-7(13-5-10(23)8-4-11(24)12(25)6-14(8)31-13)3-15(9)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)