Using CC(O)c1nc2cc(C(F)(F)F)c(Cl)cc2n1-c1ccc(CCCl)cc1 to produce CC(=O)c1nc2cc(C(F)(F)F)c(Cl)cc2n1-c1ccc(CCCl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.