(E)-4-(β-d-Allopyranosyloxy)cinnamyl 4-bromophenyl ketone ethanol solvate

The title compound, C21H21BrO7·C2H6O, was synthesized by the Claisen–Schimidt reaction of helicid (systematic name: 4-formylphenyl-β-d-allopyranoside) with 4-bromoacetophenone in ethanol. The pyran ring adopts a chair conformation. In the crystal structure, molecules are linked into a three-dimensional network by intermolecular O—H...O hydrogen bonds.