Using CC(C)(C)OC(=O)Nc1ncc(C(=O)C(=O)Nc2ccc(F)c(F)c2)s1 to produce CC(C)(C)OC(=O)Nc1ncc(C(O)C(=O)Nc2ccc(F)c(F)c2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.