Crystal and molecular structures of datiscetin and its monohydrate isolated from <i>Datisca cannabina</i> L.

L. collected in Tashkent region, Uzbekistan. In both structures, the chromenone ring system and the phenyl ring form nearly the same dihedral angles (38.3 and 38.7° for the anhydrate and monohydrate, respectively). In addition, in both structures, the mol-ecules stack through π-π inter-actions along the shortest translation axis of the unit cell [3.7601 (1) and 3.9274 (5) Å, respectively], resulting in the formation of needle-shaped single crystals.