Using CC(=O)OCC=O, CC(C)(C)OC(=O)N[C@@H]1CC[C@@H](CN)OC1 to produce CC(=O)OCCNC[C@@H]1CC[C@@H](NC(=O)OC(C)(C)C)CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.