All interatomic distances in the title compound, C28H34N4O4, are normal. Th
e (4-ethoxyphenyl)amino parts of the side branches are almost ideally plana
r. The overall arrangement of the side branches seems to be imposed by hydr
ogen bonds. The substituents are stabilized by interbranch N-H . . .O hydro
gen bonds. The structure of the title compound is assembled by intermolecul
ar N-H . . .O hydrogen bonds, forming a two-dimensional framework.