Using O=C(NCCc1ccc(C(F)(F)F)cc1)C(F)(F)F, C=O to produce O=C(N1CCc2ccc(C(F)(F)F)cc2C1)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.