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