Using CCOC(=O)C1=C(C(F)(F)F)COc2ccc3ccccc3c21 to produce O=C(O)C1=C(C(F)(F)F)COc2ccc3ccccc3c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.