InChI=1S/C21H18O14/c22-6-2-8(24)7(23)1-5(6)11-3-9(25)13-12(33-11)4-10(26)14(27)18(13)34-21-17(30)15(28)16(29)19(35-21)20(31)32/h1-4,15-17,19,21-24,26-30H,(H,31,32)