Using O=C(O)CC1CCn2c1c(Sc1ccc(Cl)cc1)c1c(C(=O)C(F)(F)F)cc(F)cc12 to produce O=C(O)CC1CCn2c1c(Sc1ccc(Cl)cc1)c1c(C(O)C(F)(F)F)cc(F)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.