Using O=[N+]([O-])c1ccc2c(c1)C(=CCCN1CCC(O)(c3ccc(Cl)cc3)CC1)c1ccccc1CO2 to produce Nc1ccc2c(c1)C(=CCCN1CCC(O)(c3ccc(Cl)cc3)CC1)c1ccccc1CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.