Using Nc1cc(C(F)(C(F)(F)F)C(F)(F)F)ccc1O, O=C(O)c1ccncc1 to produce O=C(Nc1cc(C(F)(C(F)(F)F)C(F)(F)F)ccc1O)c1ccncc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.