title: 3-Hy-droxy-4-(3-hy-droxy-phen-yl)-2-quinolone monohydrate.
abstract: In the title compound, also known as viridicatol monohydrate, C(15)H(11)NO(3)·H(2)O, the dihedral angle between the benzene ring and quinoline ring system is 64.76 (5)°. An intra-molecular O-H⋯O hydrogen bond occurs. The crystal structure is stabilized by classical inter-molecular N-H⋯O and O-H⋯O hydrogen bonds and weak π-π inter-actions with a centroid-centroid distance of 3.8158 (10) Å.
authors.forename: Yi-Wen
authors.initials: YW
authors.lastname: Tao
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
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