Using COC(=O)CNC(=O)[C@@H](N)CC(OC(C)(C)C)C(=O)O, CC(C)[C@H](NC(=O)OC(C)(C)C)C(=O)N1CCC[C@H]1C(=O)NCC(=O)Oc1ccc([N+](=O)[O-])cc1 to produce COC(=O)CNC(=O)[C@H](CC(OC(C)(C)C)C(=O)O)NC(=O)CNC(=O)[C@@H]1CCCN1C(=O)[C@@H](NC(=O)OC(C)(C)C)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.