Using O=C(O)C(CC1CCCC1)c1ccc(C(F)(F)F)c(F)c1, Nc1nccs1 to produce O=C(Nc1nccs1)C(CC1CCCC1)c1ccc(C(F)(F)F)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.