Using CCOC(=O)c1ncn2c(C(F)(F)F)cc(-c3ccc(C(F)(F)F)cc3)nc12 to produce O=C(O)c1ncn2c(C(F)(F)F)cc(-c3ccc(C(F)(F)F)cc3)nc12, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.