InChI=1S/C21H22O11/c1-8(13(23)11-6-7-12(22)15(25)14(11)24)9-2-4-10(5-3-9)31-21-18(28)16(26)17(27)19(32-21)20(29)30/h2-8,16-19,21-22,24-28H,1H3,(H,29,30)