Using NC(=O)CCC(=O)NBr, COC(=O)c1c(C)cc(Cl)cc1C(F)(F)F to produce COC(=O)c1c(CBr)cc(Cl)cc1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.