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In the title compound (alternatively called 4′,5,7-trimethoxy­flavone methanol solvate hydrate), C 18 H 16 O 5 ·CH 3 OH·H 2 O, the flavone mol­ecule is almost planar, the inter­planar angle between the planes of the benzopyran-4-one group and the attached benzene ring being 4.69 (9)°. In the crystal, the flavone mol­ecule makes inter­molecular C—H⋯O hydrogen bonds to adjacent inversion-related flavone mol­ecules, generating  R22 (8) and  R22 (14) rings and an infinite ribbon. The inversion-related ribbons are stabilized through the inter­stitial water and methanol mol­ecules  via  inter­molecular O—H⋯O hydrogen bonds, generating  R42 (8) and  R21 (6) rings and  C22 (4) chains, and are further sustained by π–π inter­actions with an inter­planar spacing of 3.365 (2)Å.

5,7-Dimethoxy-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one methanol solvate monohydrate