{(<i>E</i>)-4-Hydroxy-<i>N</i>′-[phenyl(pyridin-2-yl-κ<i>N</i>)methylidene]benzohydrazide-κ<sup>2</sup><i>N</i>′,<i>O</i>}bis(nitrato-κ<sup>2</sup><i>O</i>,<i>O</i>′)copper(II)
Acta crystallographica. Section E