Poly[[(<i>N</i>,<i>N</i>-dimethylformamide-κ<i>O</i>)(μ<sub>3</sub>-pyrazine-2,3-dicarboxylato-κ<sup>4</sup><i>N</i><sup>1</sup>,O<sup>2</sup>:<i>O</i><sup>3</sup>:<i>O</i><sup>3</sup>)copper(II)] monohydrate]
Acta crystallographica. Section E