InChI=1S/C21H16O12/c22-5-6-1-8-13(15(26)12-9(14(8)25)3-7(23)4-10(12)24)11(2-6)32-21-18(29)16(27)17(28)19(33-21)20(30)31/h1-5,16-19,21,23-24,27-29H,(H,30,31)