Using CCCc1ccc(O)cc1, O=C(O)c1ccc(OC(F)(F)F)cc1 to produce CCCc1ccc(OC(=O)c2ccc(OC(F)(F)F)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.