Using [N-]=[N+]=[N-], O=C(CCC(=O)c1ccc(Br)cc1)OCc1ccccc1 to produce [N-]=[N+]=NC(CC(=O)OCc1ccccc1)C(=O)c1ccc(Br)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.