InChI=1S/C21H22O10/c1-28-12-4-2-9(3-5-12)17-18(30-17)10-6-11(22)8-13(7-10)29-21-16(25)14(23)15(24)19(31-21)20(26)27/h2-8,14-19,21-25H,1H3,(H,26,27)