Using COC(=O)c1ccc2nc(-c3c(Cl)cccc3C(F)(F)F)[nH]c2c1 to produce O=C(O)c1ccc2nc(-c3c(Cl)cccc3C(F)(F)F)[nH]c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.