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