InChI=1S/C21H16O13/c22-9-2-5(19(29)30)1-7-11(9)14(25)12-8(13(7)24)3-6(4-10(12)23)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)