Using CCOC(=O)c1c(C(Cl)Cl)nc2c(C(F)(F)F)cccc2c1O to produce O=C(O)c1c(C(Cl)Cl)nc2c(C(F)(F)F)cccc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.