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