InChI=1S/C22H20O10/c1-7-6-9(23)12(20(26)27)16-10(7)21(28)31-18-14(25)17(29-5)11(8(2)15(18)30-16)13(24)19-22(3,4)32-19/h6,19,23,25H,1-5H3,(H,26,27)