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5,6,7,5′-Tetra­meth­oxy-3′,4′-methyl­ene­dioxy­flavone monohydrate

By Hou-Jin Li, Da-Lang Zhou, Ting-Juan Xu, Chi-Keung Lam and Wen-Jian Lan


The title compound [systematic name: 5,6,7-trimeth­oxy-2-(7-meth­oxy-1,3-dihydro-2-benzofuran-5-yl)-4H-chromen-4-one monohydrate], C20H18O8·H2O, was isolated from the popular Chinese medicinal plant Entada phaseoloides. In the crystal, inversion-related mol­ecules are joined by pairs of weak C—H⋯O hydrogen bonds. The dimers are further inter­connected by a bridging water mol­ecule via weak C—H⋯Owater and pairs of (O—H)water⋯O hydrogen bonds into a linear tape running parallel to the b axis

Topics: Organic Papers
Publisher: International Union of Crystallography
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Provided by: PubMed Central
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