Using O=CN(C[C@@H](CC1CCCC1)C(=O)O)OCc1ccccc1, Fc1nc(F)nc(F)n1 to produce O=CN(C[C@@H](CC1CCCC1)C(=O)F)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.