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Acta Cryst. (2013). E69, o1500-o1501
[ doi:10.1107/S1600536813023891 ]


S. Chantrapromma, T. Suwunwong, P. Ruanwas, C. K. Quah and H.-K. Fun

Abstract: In the title 3-cyanopyridine derivative, C21H19N3O4, the 3-cyano-substituted pyridine ring forms dihedral angles of 2.35 (5) and 41.60 (5)° with the unsubstituted pyridine and 2,4,5-trimethoxy-substituted benzene rings, respectively. The dihedral angle between the unsubstituted pyridine and benzene rings is 39.84 (5)°. The methoxy groups form Cmethyl-O-C-(C,N) torsion angles in the range 0.80 (15)-11.45 (15)°. In the crystal, molecules related by 21 screw axes are linked by weak C-H...N hydrogen bonds along [010]. In addition, weak C-H...[pi] interactions and [pi]-[pi] stacking interactions between pyridine rings, with a centroid-centroid distance of 3.6448 (6) Å, are observed.

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