InChI=1S/C22H18O12/c23-8-2-1-6-11(8)20(29)33-17-12(6)9(5-10-13(17)7-3-4-30-21(7)31-10)32-22-16(26)14(24)15(25)18(34-22)19(27)28/h3-5,7,14-16,18,21-22,24-26H,1-2H2,(H,27,28)