title: Crystal structure of 2-(3,4-di-meth-oxy-phen-yl)-3-hy-droxy-4H-chromen-4-one.
abstract: In the title compound, C17H14O5, the dimeth-oxy-substituted benzene ring is twisted relative to the 4H-chromenon skeleton (r.m.s. deviation = 0.015 Å) by 5.2 (4)°. The C atoms of the meth-oxy groups lie close to the plane of their attached benzene ring [deviations = 0.036 (3) and 0.290 (3)Å for the meta and para substituents, respectively]. An intra-molecular O-H⋯O hydrogen bond closes an S(5) ring. In the cystal, inversion dimers linked by pairs of O-H⋯O hydrogen bonds generate R 2 (2)(10) loops and C-H⋯O inter-actions connect the dimers into [010] chains.
authors.affiliation: Department of Applied Chemistry, Dongduk Women's University, Seoul 136-714, Republic of Korea.
authors.forename: Jin Sil
authors.initials: JS
authors.lastname: Yoo
authors.affiliation: Division of Bioscience and Biotechnology, BMIC, Konkuk University, Seoul 143-701, Republic of Korea.
authors.forename: Yoongho
authors.initials: Y
authors.lastname: Lim
authors.affiliation: Department of Applied Chemistry, Dongduk Women's University, Seoul 136-714, Republic of Korea.
authors.forename: Dongsoo
authors.initials: D
authors.lastname: Koh
keywords: 4H-chromen-4-one; biological properties; crystal structure; flavonols; natural products