Using O=C1NC(=O)C(=Cc2cn(-c3ccccc3)nc2-c2cc(F)cc(F)c2)S1, CCBr to produce CCN1C(=O)SC(=Cc2cn(-c3ccccc3)nc2-c2cc(F)cc(F)c2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.