Using CCOC(=O)CCc1nc(-c2ccc(C(F)(F)F)cc2)ccc1N to produce O=C1CCc2nc(-c3ccc(C(F)(F)F)cc3)ccc2N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.