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