ईमेल रिकॉर्ड : Poly[[bis­{μ(2)-1,2-bis­[(1H-imidazol-1-yl)meth­yl]benzene}(μ(4)-9,10-dioxo-9,10-dihydro­anthracene-1,4,5,8-tetra­carbox­yl­ato)dicobalt(II)] dihydrate]