Using O=C([O-])c1ccccc1, O=C1OC(=O)c2cc(F)ccc21 to produce O=C(Oc1ccc2c(c1)C(=O)OC2=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.