Using CC(C)C[C@H](N)C(=O)O, O=C(Br)c1cc(=O)[nH]c(=O)[nH]1 to produce CC(C)CC(NC(=O)c1cc(=O)[nH]c(=O)[nH]1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.