4‐(2‐Benzyl­amino­acet­yl)‐1,2,3,4‐tetra­hydro­quinoxalin‐2‐one

All inter­atomic distances of the title compound, C17H17N3O2, are normal. The phenyl ring of the benzyl­amino­methyl substituent is disordered over two positions. The heteroatom ring of the quinoxolinone system shows a half-chair conformation. The mol­ecules are held together by inter­molecular N—H⋯O hydrogen bonds resulting in a chain along the crystallographic c axis. The chains are linked via weak inter­molecular C—H⋯O and C—H⋯N hydrogen bonds into a three-dimensional hydrogen-bonded network.