InChI=1S/C20H22O10/c1-4-20(2,3)9-5-8-6-12(10(21)7-11(8)28-18(9)27)29-19-15(24)13(22)14(23)16(30-19)17(25)26/h4-7,13-16,19,21-24H,1H2,2-3H3,(H,25,26)