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