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