Using COC(=O)c1cccc2c(C(F)(F)C(F)(F)F)c(OC)ccc12 to produce COc1ccc2c(C(=O)O)cccc2c1C(F)(F)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.