Using O=C1c2ccc(Cl)cc2C(=O)N1c1ccc([N+](=O)[O-])cc1CO to produce Nc1ccc(N2C(=O)c3ccc(Cl)cc3C2=O)c(CO)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.