Using O=C(O)c1ccc2cnccc2n1, NCc1ccccc1C(F)(F)F to produce O=C(NCc1ccccc1C(F)(F)F)c1ccc2cnccc2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.