Using N=C(NCCC[C@@H](NC(=O)OCc1ccccc1)C(=O)O)N[N+](=O)[O-], CC(C)(C)OC(=O)[C@@H](N)Cc1ccccc1 to produce CC(C)(C)OC(=O)[C@H](Cc1ccccc1)NC(=O)[C@@H](CCCNC(=N)N[N+](=O)[O-])NC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.