Using O=C(O)C(Oc1cccc2ccccc12)C1CC1, Nc1ccc(Cl)cc1 to produce O=C(Nc1ccc(Cl)cc1)C(Oc1cccc2ccccc12)C1CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.