InChI=1S/C21H20O10/c1-9(10-2-4-11(22)5-3-10)15(24)13-7-6-12(8-14(13)23)30-21-18(27)16(25)17(26)19(31-21)20(28)29/h2-8,16-19,21-23,25-27H,1H2,(H,28,29)