Using O=C([O-])[O-], CCOC(=O)c1cccc(C(CC(=O)c2ccc(=O)[nH]c2)c2ccc(Cl)cc2F)c1 to produce CCOC(=O)c1cccc(C(CC(=O)c2ccc(=O)n(C)c2)c2ccc(Cl)cc2F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.