Using NCc1cccnc1, O=C(O)C=Cc1ccc(NC(=O)C(F)(F)F)cc1 to produce O=C(C=Cc1ccc(NC(=O)C(F)(F)F)cc1)NCc1cccnc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.