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