Using ClCCl, O=C(O)C1CC(=O)N(c2ccc(OCc3ccccc3)cc2)C1 to produce COC(=O)C1CC(=O)N(c2ccc(OCc3ccccc3)cc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.