Using C=CC(=O)N1CCN(C(=O)c2cc(-c3ccccc3Cl)c(Cl)cc2OC)CC1 to produce C=CC(=O)N1CCN(C(=O)c2cc(-c3ccccc3Cl)c(Cl)cc2O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.