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