Using O=C(Cl)c1c(Cl)cccc1Cl, NCc1ccc(C(F)(F)F)cc1 to produce O=C(NCc1ccc(C(F)(F)F)cc1)c1c(Cl)cccc1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.