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