2-(3-Methyl-2-oxoquinoxalin-1-yl)--(4-methyl-phen-yl)acetamide.

The quinoxaline moiety in the title mol-ecule, CHNO, is not quite planar and the -tolyl group is rotationally disordered over two nearly equally populated sets of sites. In the crystal, N-H⋯O and C-H⋯O hydro-gen bonds form chains extending along the -axis direction. Due to the disorder of the -tolyl rings, short C⋯C distances are observed between adjacent chains.