1,7-Dihydroxy-2,3,4-trimethoxy-9H-xanthen-9-one monohydrate from Halenia elliptica
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چکیده
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.
منابع مشابه
6-Amino-9H-purine-1,7-diium bis(4-methylbenzenesulfonate) monohydrate
The asymmetric unit of the title compound, C(5)H(7)N(5) (2+)·2C(7)H(7)O(3)S(-)·H(2)O, consists of one diprotonated adeninium cation, two p-toluene-sulfonic acid anions and one water mol-ecule. In the crystal, the cations and anions are connected through N-H⋯O hydrogen bonds forming R(2) (2)(8) and R(2) (2)(9) graph-set motifs. The solvent water mol-ecule links cations and anions through O-H⋯O a...
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متن کاملA new xanthone from Moutabea guianensis Aubl.
The ethyl acetate extract of the roots of Moutabea guianensis gave 1,6-dihydroxy-4,7,8-trimethoxy-9H-xanthen-9-one (1), a new xanthone. The isolation was accomplished by column chromatography on silica gel and the structural elucidation of this compound was established by spectroscopic analyses including 1D and 2D NMR and HRESIMS.
متن کامل3-Hydroxy-1,2-dimethoxyxanthone
THE TITLE COMPOUND (SYSTEMATIC NAME 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].
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