InChI=1S/C21H18O13/c22-7-2-1-6(11-5-9(24)13-8(23)4-10(25)14(26)18(13)32-11)3-12(7)33-21-17(29)15(27)16(28)19(34-21)20(30)31/h1-5,15-17,19,21-23,25-29H,(H,30,31)