Diaqua­bis­(N,N-diethyl­pyridine-3-carboxamide-κN (1))bis­{4-[2-(2,4-dioxopentan-3-yl­idene)hydrazin-1-yl]benzoato-κO}copper(II)

In the title compound, [Cu(C(12)H(11)N(2)O(4))(2)(C(10)H(14)N(2)O)(2)(H(2)O)(2)], the Cu(II) atom lies on a center of inversion and is coordinated by carboxyl­ate O atoms, pyridine N atoms and two water mol­ecules in an elongated octa­hedral geometry. The pyridine ring is oriented at a dihedral angle of 74.83 (12)° with respect to the benzene ring. Intra­molecular O—H⋯O and N—H⋯O hydrogen bonding is observed. The water mol­ecule is a hydrogen-bond donor to the carbonyl O atom of an adjacent carboxyl­ate group, generating a chain running along the a axis. One of the ethyl groups is disordered over two sets of sites in a 0.787 (5):0.213 ratio.