Using COC(=O)[C@@H](N)CNC(=O)OC(C)(C)C, CCOC(=O)CN=C=O to produce CCOC(=O)CNC(=O)N[C@@H](CNC(=O)OC(C)(C)C)C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.