Using FC(F)(F)c1ccnc(Nc2cc(Br)cc(-c3cncs3)c2)n1, CC(C)=O to produce CC(C)(O)c1ncc(-c2cc(Br)cc(Nc3nccc(C(F)(F)F)n3)c2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.