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In the title molecule, C18H15NO4, the benzoate ring is oriented at a dihedral angle of 43.43 (6)° with respect to the planar [maximum deviation = 0.038 (2) Å] chromene ring. The crystal structure features R22(12) centrosymetric dimers formed via C—H...O interactions and these dimeric aggregates are connected by C—H...π interactions.

In the title compound, C10H12N2OS, the asymmetric unit consists of two independent molecules. In the crystal structure, molecules form R44(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.

In the mol­ecule of the title compound, C14H12N2S, the benzimidazole ring system and the phenyl ring form a dihedral angle of 81.36 (7)°. The crystal structure exhibits inter­molecular C—H⋯N and N—H⋯N hydrogen bonds.

Molecules of the title compound, C10H12N2OS, are interconnected by N—H...O hydrogen bonds of moderate strength into infinite chains. There are also intramolecular O—H...N bonds of moderate length. Weaker interactions are represented by C—H...N bonds as well as by π–π interactions between the imidazole and benzene rings [distance between centroids = 3.6865 (8) Å].

In the title compound, C13H17N3OS, the morpholine ring has a chair conformation. The crystal structure exhibits intermolecular C—H...O and C—H...N interactions to form a consolidated array.