Using OB(O)c1ccccc1, CC1(C)C(=O)NC(=O)N1CCNc1ncc(Br)c(-c2ccc(Cl)s2)n1 to produce CC1(C)C(=O)NC(=O)N1CCNc1ncc(-c2ccccc2)c(-c2ccc(Cl)s2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.