Using COCCl, CC(F)(F)c1cc(S(=O)(=O)Nc2cc(Cl)cnc2Br)ccc1Cl to produce COCN(c1cc(Cl)cnc1Br)S(=O)(=O)c1ccc(Cl)c(C(C)(F)F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.