Using O=C(Cl)c1cc(Cl)ncn1, FC(F)(F)CNc1ccccc1 to produce O=C(c1cc(Cl)ncn1)N(CC(F)(F)F)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.