InChI=1S/C21H18O11/c1-6-5-8-11(14(25)10-7(13(8)24)3-2-4-9(10)22)18(12(6)23)31-21-17(28)15(26)16(27)19(32-21)20(29)30/h2-5,15-17,19,21-23,26-28H,1H3,(H,29,30)