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