Piperidinium 3-[(4-hydroxy-5,7-di­methyl-2-oxo-2H-chromen-3-yl)­phenyl­methyl]-5,7-di­methyl-2-oxo-2H-chromen-4-olate

In the title salt, C 5 H 12 N + .C 29 H 23 O 6 - , both benzopyran systems are planar. Intermolecular N-H...O hydrogen bonds and a short O-H...O intramolecular hydrogen bond are observed in the structure.