Using COc1ccc(C[C@H](N)C(=O)O)cc1[N+](=O)[O-], Cl to produce COc1ccc(C[C@H](Cl)C(=O)O)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.