2'-Carb-oxy-meth-oxy-4,4'-bis-(3-methyl-but-2-en-yloxy)chalcone.

In the title compound, C27H30O6, also known as sofalcone, an anti-ulcer agent used for the protection of gastric mucosa­, the two benzene rings form a dihedral angle of 6.78 (11)°. Inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into centrosymmetric dimers, which are further linked by weak C—H⋯O inter­actions into ribbons propagated in [2\overline{1}0]. Finally, π–π inter­actions between the benzene rings [centroid–centroid distance = 3.583 (13) A] stabilize the crystal packing.