Using COC(=O)c1cc(Cl)c(C(F)(F)C(F)(F)C(F)(F)F)[nH]c1=O to produce O=C(O)c1cc(Cl)c(C(F)(F)C(F)(F)C(F)(F)F)[nH]c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.