InChI=1S/C21H16FNO7/c1-28-21(27)19-16(24)5-2-6-17(19)29-9-3-4-12-7-8-14(22)13(10-12)18-11-15(20(25)26)23-30-18/h2-8,10-11,24H,9H2,1H3,(H,25,26)/b4-3+