Using N#CBr, NC(CO)c1ccc(NC(=O)Nc2ccc(Cl)cc2)cc1 to produce NC1=NC(c2ccc(NC(=O)Nc3ccc(Cl)cc3)cc2)CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.