Using O=C(O)CC1CCN(Cc2cc(-c3ccccc3)no2)CC1, O=C(Cl)C(=O)Cl to produce O=C(Cl)CC1CCN(Cc2cc(-c3ccccc3)no2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.