InChI=1S/C21H22O10/c1-28-12-8-11(30-21-18(25)16(23)17(24)19(31-21)20(26)27)9-13(29-2)14(12)15(22)10-6-4-3-5-7-10/h3-9,16-19,21,23-25H,1-2H3,(H,26,27)