Using CC(C)(C)Oc1nc(F)c(C#N)cc1F, COC(=O)CC(=O)OC(C)(C)C to produce COC(=O)C(C(=O)OC(C)(C)C)c1nc(OC(C)(C)C)c(F)cc1C#N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.