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