Using CCCCCCCCCCCCOc1c(F)c(F)cc(F)c1F, O=C=O to produce CCCCCCCCCCCCOc1c(F)c(F)c(C(=O)O)c(F)c1F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.