Using CCOC(=O)C1CCN(C(=O)C23CC(c4ccccc42)c2ccc(Cl)cc23)CC1 to produce OCC1CCN(CC23CC(c4ccccc42)c2ccc(Cl)cc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.