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