title: 5,7-Dihydroxy-6,4'-dimeth-oxyflavone.
abstract: In the title compound, C(17)H(14)O(6), the benzopyran ring system is essentially planar and forms a dihedral angle of 6.84 (4)° with the other benzene ring. In the crystal structure, centrosymmetrically related mol-ecules are linked into dimers by O-H⋯O hydrogen bonds. The crystal packing is controlled by C-H⋯π and π-π stacking inter-actions involving the benzopyran and benzene rings, with centroid-centroid distances between 3.645 (2) and 3.986 (2) Å.
authors.forename: Ming-Yue
authors.initials: MY
authors.lastname: Mou
authors.forename: Ke
authors.initials: K
authors.lastname: Pi
authors.forename: Qi-Long
authors.initials: QL
authors.lastname: Zhang
authors.forename: Yun-Qian
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Qian-Jun
authors.initials: QJ
authors.lastname: Zhang