InChI=1S/C20H20O11/c1-28-12-7-13-10(3-5-14(22)30-13)6-9(12)2-4-11(21)8-29-20-17(25)15(23)16(24)18(31-20)19(26)27/h2-7,15-18,20,23-25H,8H2,1H3,(H,26,27)