3-{2-[(3-Phenylquinoxalin-2-yl)oxy]ethyl}-1,3-oxazolidin-2-one

The asymmetric unit of the title compound, C19H17N3O3, consists of two independent molecules that are disposed about a pseudo-centre of inversion. The plane of the phenyl substituent is twisted by 38.1 (1)degrees [43.6 (1)degrees in the second molecule] out of the plane of the quinoxaline ring system. The five-membered ring of the substituent at the 2-position adopts an envelope conformation; the 5-CH2 atom representing the flap lies out of the plane defined by the other four atoms [deviation 0.264 (7) angstrom in the first molecule and 0.291 (6) angstrom in the second]. The dihedral angle between the five-membered ring and the 4-phenyl ring is 84.9 (1)degrees while that between the five-membered ring and the 5-phenyl ring is 65.6 (1)degrees.