Using COC(=O)c1cccc(CBr)c1C(=O)OC, CNC(=O)OC(C)(C)C to produce COC(=O)c1cccc(CN(C)C(=O)OC(C)(C)C)c1C(=O)OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.