Using CC(C)(C)OC(=O)N[C@H](Cc1ccc([N+](=O)[O-])cc1)C(=O)O, COC(=O)[C@@H](N)Cc1ccc([N+](=O)[O-])cc1 to produce COC(=O)[C@H](Cc1ccc([N+](=O)[O-])cc1)NC(=O)[C@@H](Cc1ccc([N+](=O)[O-])cc1)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.