Using CC1=CC=CNC1(Br)C(=O)NC(C)(C)C, Clc1cccc(CBr)c1 to produce CC(C)(C)NC(=O)C1(Br)NC=CC=C1CCc1cccc(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.