InChI=1S/C20H18O11/c1-29-13-4-8(2-3-11(13)21)10-7-30-14-6-9(5-12(22)15(14)16(10)23)31-18(20(27)28)17(24)19(25)26/h2-6,10,17-18,21-22,24H,7H2,1H3,(H,25,26)(H,27,28)