Merochlorophaeic acid is a

depside A depside is a type of polyphenolic compound composed of two or more monocyclic aromatic units linked by an ester bond. Depsides are most often found in lichens, but have also been isolated from higher plants, including species of the Ericaceae, L ...

with the molecular formula C₂₄H₃₀O₈ which has been isolated from the lichen '' Cladonia merochlorophaea''.

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Further reading