Acta Cryst. (2009). E65, o1523  [ doi:10.1107/S1600536809021254 ]

2-Hydroxy-1-methoxyanthraquinone monohydrate

Z.-M. Liu and Y.-Q. Jiao

Abstract: The title compound, C₁₅H₁₀O₄·H₂O, also known as alizarin 1-methyl ether monohydrate, was isolated from Morinda officinalis How. The anthraquinone ring system is almost planar, the dihedral angle between the two outer benzene rings being 3.07 (4)°. In the crystal structure, O-HO hydrogen bonds link the organic molecules and the water molecules, forming a three-dimensional network.

Online 6 June 2009

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