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