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