Using CS(=O)(=O)O[C@H]1CN(C(=O)OCc2ccc([N+](=O)[O-])cc2)[C@H](N2CCNC2=O)C1=C=O to produce CS(=O)(=O)O[C@H]1CN[C@@H](N2CCNC2=O)C1=C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.