InChI=1S/C21H20O11/c1-29-13-7-12-10(14(22)15(13)23)6-11(31-12)8-3-2-4-9(5-8)30-21-18(26)16(24)17(25)19(32-21)20(27)28/h2-7,16-19,21-26H,1H3,(H,27,28)