Using OB(O)c1ccccc1, CC(C)(C)Nc1nc2c(Br)cccc2nc1Cl to produce CC(C)(C)Nc1nc2c(Br)cccc2nc1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.