InChI=1S/C22H20O10/c1-8(2)5-11(24)14-10(7-23)17-20(16(26)19(14)30-4)32-22(29)13-9(3)6-12(25)15(21(27)28)18(13)31-17/h5-6,23,25-26H,7H2,1-4H3,(H,27,28)