InChI=1S/C20H18O14/c21-11-8-5(32-15(7-4-31-7)9(11)10(17(25)26)18(27)28)2-1-3-6(8)33-20-14(24)12(22)13(23)16(34-20)19(29)30/h1-3,7,10,12-14,16,20,22-24H,4H2,(H,25,26)(H,27,28)(H,29,30)