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The title compound, C19H18O8 [systematic name: 5‐hydroxy‐2‐(3‐hydroxy‐4,5‐di­methoxy­phenyl)‐3,7‐di­methoxy­chromen‐4‐one], an extract from Premna tomentosa willd, is used in the Siddha system of medicine practiced in South India. The dihedral angle between the mean planes through the benzo­pyran moiety and benzene ring is 38.60 (7)°. A strong O—H·O intramolecular hydrogen bond is observed in the molecular structure. O—H·O and C—H·O hydrogen bonds and π–π interactions stabilize the mol­ecules in the crystal packing.

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