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