Using COC(=O)c1nn(CCBr)c(C(=O)OC)c1OCc1ccccc1, [N-]=[N+]=[N-] to produce COC(=O)c1nn(CCN=[N+]=[N-])c(C(=O)OC)c1OCc1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.