title: 3-Hy-droxy-1,2-dimeth-oxyxanthone.
abstract: 3-hy-droxy-1,2-dimeth-oxy-9H-xanthen-9-one), C(15)H(12)O(5), was isolated from Polygala arillata. The tricyclic unit is essentially planar (r.m.s. deviation = 0.039 Å). In the crystal, the mol-ecules form stacks along the a axis. Inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into chains parallel to [010].
authors.forename: Hui-Ping
authors.initials: HP
authors.lastname: Xiong
authors.forename: Zhi-Jun
authors.initials: ZJ
authors.lastname: Wu
authors.forename: Fa-Tang
authors.initials: FT
authors.lastname: Chen
authors.forename: Dong-Sheng
authors.initials: DS
authors.lastname: Chen