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