Using [N-]=[N+]=[N-], CCOC(=O)c1c(CBr)cccc1S(N)(=O)=O to produce CCOC(=O)c1c(CN=[N+]=[N-])cccc1S(N)(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.