3-Hydroxy-1,2-dimethoxyxanthone
نویسندگان
چکیده
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].
منابع مشابه
Crystal structure of (2E)-1-(4-hydroxy-1-methyl-2-oxo-1,2-dihydroquinolin-3-yl)-3-(4-hydroxy-3-methoxyphenyl)prop-2-en-1-one
In the title compound, C20H17NO5, the dihedral angle between the mean plane of the di-hydro-quinoline ring system (r.m.s. deviation = 0.003 Å) and the benzene ring is 1.83 (11)°. The almost planar conformation is a consequence of an intra-molecular O-H⋯O hydrogen bond and the E configuration about the central C=C bond. In the crystal structure, O-H⋯O hydrogen bonds generate chains of mol-ecules...
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