Crystal structure of bis(μ-4-nitrobenzoato-κ<sup>2</sup><i>O</i>:<i>O</i>′)bis[bis(4-methylpyridine-κ<i>N</i>)(4-nitrobenzoato-κ<sup>2</sup><i>O</i>,<i>O</i>′)manganese(II)]
Acta crystallographica. Section E, Crystallographic communications