Using O=C(OCc1ccccc1)N1CCN(C(=O)C2CCN(c3c(Cl)cncc3Cl)CC2)CC1 to produce O=C(C1CCN(c2c(Cl)cncc2Cl)CC1)N1CCNCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.