InChI=1S/C20H22O11/c1-20(27,7-28-19-16(24)14(22)15(23)17(31-19)18(25)26)12-5-9-4-8-2-3-13(21)30-10(8)6-11(9)29-12/h2-4,6,12,14-17,19,22-24,27H,5,7H2,1H3,(H,25,26)