Using COc1ccc(-c2nc(SC(F)(F)C(F)Br)[nH]c2-c2ccc(OC)cc2)cc1 to produce COc1ccc(-c2nc3n(c2-c2ccc(OC)cc2)C(F)C(F)(F)S3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.