Using O=C(O)c1ccncc1, Nc1cc(Cl)c(C(F)(F)F)cc1O to produce O=C(Nc1cc(Cl)c(C(F)(F)F)cc1O)c1ccncc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.