InChI=1S/C21H18O13/c22-7-3-8(23)14-9(24)5-12(32-13(14)4-7)6-1-10(25)18(11(26)2-6)33-21-17(29)15(27)16(28)19(34-21)20(30)31/h1-5,15-17,19,21-23,25-29H,(H,30,31)