Using NCCc1c[nH]c2ccc(Cl)cc12, O=C(O)c1cccc(Nc2cccc(C(F)(F)F)c2)c1 to produce O=C(NCCc1c[nH]c2ccc(Cl)cc12)c1cccc(Nc2cccc(C(F)(F)F)c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.