In the title complex, [Cu(CHON)]·2CHO·2HO, the Cu ion lies on a center of inversion and coordinates with symmetry related pyridine nitro-gen and carboxyl oxygen atoms from two pyridine-2-carb-oxy-lic acid anions, giving rise to a square-planar coordination geometry. There are weak axial bonds between Cu and an O atom of a symmetry-related trimesic acid moieties [Cu⋯O = 2.837 (2) Å] The Cu⋯O weak inter-actions and hydrogen bonds stabilize the whole structure.
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