C-H...O and C-H...π(arene) interactions in (2S,4S,5R)-(-)-2-(4-propoxyphenyl)-3,4-dimethyl-5-phenyl-1,3-oxazolidine

The title compound, C₂₀H₂₅NO₂, a condensation product of l-ephedrine and 4-propoxyaldehyde, is of interest in studies on weak interactions. It crystallizes with C-H...O and C-H...π(arene) intermolecular interactions as a one-dimensional chain [C...O = 3.3745 (19) Å, C-H...O = 139°; C-H...Cg1 = 3.6987 (16) Å, C-H...Cg1 = 161°, where Cg1 is the centroid of the symmetry-related 4-propoxy-substituted aromatic ring]