InChI=1S/C21H20O11/c1-7-3-10(22)14-11(30-7)5-8-4-9(29-2)6-12(13(8)15(14)23)31-21-18(26)16(24)17(25)19(32-21)20(27)28/h3-6,16-19,21,23-26H,1-2H3,(H,27,28)