InChI=1S/C16H12FN3O3/c17-11-3-1-10(2-4-11)7-12-5-6-15(23-12)13(21)8-14(22)16-18-9-19-20-16/h1-6,8-9,22H,7H2,(H,18,19,20)/b14-8-