title: 2'-Carb-oxy-meth-oxy-4,4'-bis-(3-methyl-but-2-en-yloxy)chalcone.
abstract: In the title compound, C(27)H(30)O(6), 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)°. Inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers, which are further linked by weak C-H⋯O inter-actions into ribbons propagated in [2[Formula: see text]0]. Finally, π-π inter-actions between the benzene rings [centroid-centroid distance = 3.583 (13) Å] stabilize the crystal packing.
authors.forename: Yan-Shu
authors.initials: YS
authors.lastname: Liang
authors.forename: Shuai
authors.initials: S
authors.lastname: Mu
authors.forename: Jing-Yang
authors.initials: JY
authors.lastname: Wang
authors.forename: Deng-Ke
authors.initials: DK
authors.lastname: Liu