InChI=1S/C22H20O12/c23-7-1-13-15(14(2-7)33-22-18(26)16(24)17(25)20(34-22)21(27)28)19-9(5-29-13)8-3-11-12(31-6-30-11)4-10(8)32-19/h1-4,9,16-20,22-26H,5-6H2,(H,27,28)