6-(4-Amino-phen-yl)-2-eth-oxy-4-(2-thien-yl)nicotinonitrile.

In the title nicotinonitrile derivative, C(18)H(15)N(3)OS, the central pyridyl ring makes dihedral angles of 25.22 (10) and 24.80 (16)° with the 4-amino-phenyl and thio-phene rings, respectively. The thio-phene ring is disordered over two orientations by rotation around the C(thio-phene)-C(pyridine) bond; the occupancies are 0.858 (2) and 0.142 (2). The eth-oxy group is slightly twisted from the attached pyridyl ring [C-O-C-C torsion angle = 171.13 (16)°]. In the crystal structure, mol-ecules are linked by N-H⋯N hydrogen bonds into chains along [010]. These chains are stacked along the a axis. C-H⋯π weak inter-actions involving the thio-phene ring are observed.