Using COc1cc(C(O)(C(F)(F)F)C(F)(F)F)ccc1CCC(=O)O, CO to produce COC(=O)CCc1ccc(C(O)(C(F)(F)F)C(F)(F)F)cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.