Using Nc1ccc(Cl)c(Cl)c1, O=C(O)Cc1ccc(Br)cc1F to produce O=C(Cc1ccc(Br)cc1F)Nc1ccc(Cl)c(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.