InChI=1S/C21H16O12/c22-5-6-1-8-12(10(23)2-6)15(26)13-9(14(8)25)3-7(4-11(13)24)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)