Using C=CCC1(C(F)(F)F)c2cc(Cl)ccc2NC(=O)N1CC(F)(F)F to produce CCCC1(C(F)(F)F)c2cc(Cl)ccc2NC(=O)N1CC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.