Using CCOC(=O)c1[nH]c2ccc(Br)cc2c1S(=O)(=O)N1CCOCC1, BrBr to produce CCOC(=O)c1[nH]c2cc(Br)c(Br)cc2c1S(=O)(=O)N1CCOCC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.