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