Methyl 4-(4-chloro­phen­yl)-8-iodo-2-methyl-6-oxo-1,6-dihydro-4H-pyrimido[2,1-b]quinazoline-3-carboxyl­ate

In the title compound, C20H15ClIN3O3, the dihedral angle between the quinazolinone ring system [r.m.s. deviation = 0.047 (2) A] and the pendant benzene ring is 82.63 (11)°. The mol­ecular conformation is stabilized by intra­molecular C—H⋯O inter­actions. In the crystal, the mol­ecules are linked by N—H⋯O hydrogen bonds into chains along the a-axis direction. Another set of chains propagating along [101] is formed due to inter­molecular I⋯Cl short contacts of 3.427 (1) A, thus giving layers parallel to (010). The layers are connected by C—H⋯π and π–π inter­actions, the shortest distance between the centroids of aromatic rings being 3.8143 (16) A.