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