InChI=1S/C21H18O13/c22-4-5-1-7-11(15(27)12(5)24)14(26)10-8(13(7)25)2-6(3-9(10)23)33-21-18(30)16(28)17(29)19(34-21)20(31)32/h1-3,16-19,21-24,27-30H,4H2,(H,31,32)