Gravar-mail: Crystal structure and Hirshfeld surface analysis of (μ-2-{4-[(carboxyl­atometh­yl)carbamo­yl]benz­amido}­acetato-κ(2) O:O′)bis­[bis­(1,10-phenanthroline-κ(2) N,N′)copper(II)] dinitrate N,N′-(1,4-phenyl­enedicarbon­yl)diglycine monosolvate octa­hydrate