InChI=1S/C21H16O12/c22-6-1-2-8-9(3-6)30-17-12(8)20(29)31-10-4-7(23)5-11(13(10)17)32-21-16(26)14(24)15(25)18(33-21)19(27)28/h1-5,14-16,18,21-26H,(H,27,28)