Using C[C@H](NC(=O)CNC(=O)OCc1ccccc1)C(=O)N1CCC[C@H]1C(=O)O, O=C(O)CNc1ccccc1[N+](=O)[O-] to produce C[C@H](NC(=O)CNC(=O)OCc1ccccc1)C(=O)N1CCC[C@H]1C(N)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.