Crystal structure of the 1:2 co-crystal between N,N′-bis(4-pyridylmethyl)oxalamide and acetic acid as a dihydrate, C14H14N4O2⋅2 C2H4O2⋅2 H2O

C18H26N4O8, triclinic, P1̄ (no. 2), a = 4.7975(2) Å, b = 9.8725(3) Å, c = 11.0244(3) Å, α = 85.312(3)°, β = 79.872(3)°, γ = 87.600(3)°, V = 512.09(3) Å3, Z = 1, Rgt(F) = 0.0381, wRref(F2) = 0.1064, T = 100(2) K.