Using O=S(=O)(Nc1cc(Cl)cnc1Br)c1ccc(Cl)c(C(F)(F)F)c1, COCCl to produce COCN(c1cc(Cl)cnc1Br)S(=O)(=O)c1ccc(Cl)c(C(F)(F)F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.