Crystal structure and Hirshfeld surface analysis of ethyl 2-({5-acetyl-3-cyano-6-methyl-4-[(E)-2-phenyl-ethen-yl]pyridin-2-yl}sulfan-yl)acetate.

In the title mol-ecule, C(21)H(20)N(2)O(3)S, the styryl and ester substituents are displaced to opposite sides of the plane of the pyridine ring. In the crystal, C-H⋯O hydrogen bonds form chains extending parallel to the a-axis direction, which pack with partial inter-calation of the styryl and ester substituents. A Hirshfeld surface analysis indicates that the most significant contributions to the crystal packing are from H⋯H (43.6%), C⋯H/H⋯C (15.6%), O⋯H/H⋯O (14.9%) and N⋯H/H⋯N (11.2%) contacts.