Using O=C1NC(=O)c2ccccc21, CC(C)(C)C(=O)Nc1cccc(CBr)n1 to produce CC(C)(C)C(=O)Nc1cccc(CN2C(=O)c3ccccc3C2=O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.