Using [N-]=[N+]=[N-], CCOC(=O)C1=Cc2cc(Cl)c(CBr)cc2OC1C(F)(F)F to produce CCOC(=O)C1=Cc2cc(Cl)c(CN=[N+]=[N-])cc2OC1C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.