Using CCOC(=O)COc1ccc(Cl)cc1C1c2ccccc2CN1C(=O)OC(C)(C)C to produce CCOC(=O)COc1ccc(Cl)cc1C1NCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.