Evernic acid is an

organic compound Some chemical authorities define an organic compound as a chemical compound that contains a carbon–hydrogen or carbon–carbon bond; others consider an organic compound to be any chemical compound that contains carbon. For example, carbon-co ...

and

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

with the molecular formula C₁₇H₁₆O₇. Evernic acid was first isolated from the lichen ''

Usnea longissima ''Dolichousnea longissima'' ( syn. ''Usnea longissima''), commonly known by the names old man's beard or Methuselah's beard lichen, is a fruticose lichen in the family Parmeliaceae. Description This lichen is fruticose, with very long stems and ...

''. Evernic acid is soluble in hot alcohol and poorly soluble in water. Evernic acid is produced by the lichens ''

Ramalina ''Ramalina'' is a genus of greenish fruticose lichens that grow in the form of flattened, strap-like branches. Members of the genus are commonly called strap lichensField Guide to California Lichens, Stephen Sharnoff, Yale University Press, 201 ...

'', ''

Evernia ''Evernia'' is a genus of bushy lichens in the family Parmeliaceae. Oakmoss '' Evernia prunastri'' is used as a fixative agent in Eau de Cologne within the perfume industry. It is green on top and white on bottom, and divides evenly into "for ...

'', and ''

Hypogymnia ''Hypogymnia'' is a genus of foliose lichens in the family Parmeliaceae. They are commonly known as tube lichens, bone lichens, or pillow lichens. Most species lack rhizines (root-like attachment organs on the lower surface) that are otherwise c ...

''.

References

Further reading