(RS)-3-Acetyl-2-methyl-4-(3-nitro­phen­yl)-1,4,5,6,7,8-hexa­hydro­quinolin-5-one

In the title compound, C(18)H(18)N(2)O(4), the nitro group, a methyl group, the acetyl group and some atoms of the dihydro­quinolinone group are disordered over two sites with the ratio of occupancies fixed at 0.57:0.43. The relationship between the major and minor components of disorder is that of diastereomers. In the crystal structure, inter­molecular N—H⋯O, weak C—H⋯O and C—H⋯π inter­actions link the mol­ecules into two-dimensional layers running parallel to the (010) plane.