InChI=1S/C21H18O12/c22-5-6-3-8-11(10(24)4-6)14(26)12-7(13(8)25)1-2-9(23)18(12)32-21-17(29)15(27)16(28)19(33-21)20(30)31/h1-4,15-17,19,21-24,27-29H,5H2,(H,30,31)