Experimental

disorder in main residue; R factor = 0.045; wR factor = 0.116; data-to-parameter ratio = 12.0. In the title compound, C17H18N2O3S, the dihedral angles between the thiophene ring and the ethyl ester group and the pyridine-4-carboxamide unit are 7.1 (2) and 9.47 (11), respectively. An intramolecular N—H O hydrogen bond generates an S(6) ring. In the crystal, inversion dimers linked by pairs of C—H O hydrogen bonds between the tetra-hydro-1-benzothiophene and the pyridine-4-carboxamide residues generate R2 2(16) loops. There exists positional disorder in three methelene groups of the cyclohexane ring and the terminal C atom of the ethyl ester side chain in a 0.691 (14):0.309 (14) occupancy ratio. Related literature For related structures, see: Mukhtar et al. (2010a,b)