Using CCOC(=O)C(F)(F)Br, CC(C)(C)OC(=O)N1CCC(=O)CC1 to produce CCOC(=O)C(F)(F)C1(O)CCN(C(=O)OC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.