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