title: 1,7-Dihydr-oxy-2,3,4-trimeth-oxy-9H-xanthen-9-one monohydrate from Halenia elliptica.
abstract: The title compound, C(16)H(14)O(7)·H(2)O, possesses a planar three-ring skeleton; its carbonyl, one of the two hydroxy and two of the three methoxy O atoms and the water mol-ecule form hydrogen bonds, giving rise to a layer structure.
authors.forename: Peizhong
authors.initials: P
authors.lastname: Yu
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Shen
authors.forename: Changqi
authors.initials: C
authors.lastname: Hu
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Meehan
authors.forename: Liqing
authors.initials: L
authors.lastname: Chen