2-[2-(Methyl­sulfan­yl)benzimidazol-1-yl]ethanol

In the title compound, C10H12N2OS, the asymmetric unit consists of two independent mol­ecules. In the crystal structure, mol­ecules form R 4 4(28) centrosymmetric tetra­mers via O—H⋯N hydrogen bonds. These tetra­mers are stacked along the c axis via C—H⋯O hydrogen bonds. C—H⋯π and π–π inter­actions are also present; in the latter, the centroid–centroid distances are 4.075 (1) and 3.719 (1) Å

Ethyl 4-cyano-7-nitro-1,2,3,3a,4,5-hexa­hydro­pyrrolo­[1,2-a]quinoline-4-carboxyl­ate

In the title compound, C16H17N3O4, the six-membered N-containing ring adopts a half-chair conformation. One C atom of the five-membered ring is disordered over two sites, with occupancy factors of ca 0.67 and 0.33. The major pyrroline component adopts a half-chair conformation. Inter­molecular C—H⋯O hydrogen bonds forming centrosymmetric dimers are observed in the crystal

2-Oxo-2H-chromen-4-yl 4-methylbenzoate

The asymmetric unit of the title compound, C17H12O4, consists of two independent molecules. The chromen-2-one ring and the 4-methylbenzoate side chain are inclined to one another at a dihedral angle of 64.79 (10)° in one molecule and 88.3 (1)° in the other. In the crystal, molecules form R22(8) centrosymmetric dimers via C—H...O hydrogen bonds. These dimers are stacked by C—H...O hydrogen bonds, resulting in R22(18) and R32(16) ring motifs. π–π stacking interactions between two parallel chromen-2-one rings, with centroid–centroid distances of 3.743 (1) and 3.771 (1) Å, are also present