Using O=C1NC(=O)c2ccccc21, COc1cnc(C(=O)CBr)c(Cl)c1 to produce COc1cnc(C(=O)CN2C(=O)c3ccccc3C2=O)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.