Using [N-]=[N+]=[N-], O=C(CBr)c1ccccc1[N+](=O)[O-] to produce [N-]=[N+]=NCC(=O)c1ccccc1[N+](=O)[O-], please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.