Using O=C1NC(=O)c2ccccc21, NC(=O)c1cccc(CCCBr)c1 to produce NC(=O)c1cccc(CCCN2C(=O)c3ccccc3C2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.