Using O=C(O)c1cccc(Cl)c1Cl, NCC(c1ccc(F)nc1)N1CCC(F)(F)CC1 to produce O=C(NCC(c1ccc(F)nc1)N1CCC(F)(F)CC1)c1cccc(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.