Using COCOC(CO)(CC(C)(C)c1cc(F)ccc1OC)C(F)(F)F to produce COCOC(C=O)(CC(C)(C)c1cc(F)ccc1OC)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.