Using CCOC(=O)C1CN(Cc2ccccc2)CC1c1ccc(Cl)c(Cl)c1 to produce OCC1CN(Cc2ccccc2)CC1c1ccc(Cl)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.