The title compound, (4S,5R)-3,4-dimethyl-1-[(2R)-2(1-naphthyl)-2-phenylacet
yl]-5-phenylimidazolidin-2-one, C29H26N2O2, has two different aryl groups a
t the alpha-carbon which confer a stereogenic character on the site. The ge
ometry of the molecule is stabilized by an intramolecular hydrogen bond lin
king the acetamide and imidazolidine groups, which gives a planar character
to the core.