Using O=C(O)CCn1cc(CCNS(=O)(=O)c2ccc(F)cc2)c2ccccc21 to produce O=C(O)CCN1CC(CCNS(=O)(=O)c2ccc(F)cc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.