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