The crystal structure of (RS)-7-chloro-2-(2,5-di-meth-oxy-phen-yl)-2,3-di-hydro-quinazolin-4(1H)-one: two hydrogen bonds generate an elegant three-dimensional framework structure.

In the title compound, C61H15ClN2O3, the heterocyclic ring adopts an envelope conformation, folded across the N⋯N line, with the 2,5-di-meth-oxy-phenyl unit occupying a quasi-axial site. There are two N-H⋯O hydrogen bonds in the structure: one hydrogen bond links mol-ecules related by a 41 screw axis to form a C(6) chain, and the other links inversion-related pairs of mol-ecules to form an R 2 2(8) ring. The ring motif links all of the chains into a continuous three-dimensional framework structure. Comparisons are made with the structures of some related compounds.