InChI=1S/C21H16O13/c22-6-3-8-12(10(24)4-6)14(26)11-7(13(8)25)1-5(2-9(11)23)20(32)34-21-17(29)15(27)16(28)18(33-21)19(30)31/h1-4,15-18,21-24,27-29H,(H,30,31)