Using OB(O)c1ccccc1, CCn1cc(Br)nc(S(=O)(=O)Cc2ccc(Cl)cc2)c1=O to produce CCn1cc(-c2ccccc2)nc(S(=O)(=O)Cc2ccc(Cl)cc2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.