Using COC(=O)c1cc2c([nH]1)CCC2c1ccc(F)c(F)c1 to produce O=C(O)c1cc2c([nH]1)CCC2c1ccc(F)c(F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.