Thamnolic acid is a β-orcinol depside with the molecular formula C₁₉H₁₆O₁₁. Thamnolic acid was first isolated from the lichen '' Thamnolia vermicularis'', but it also occur in ''

Cladonia ''Cladonia'' is a genus of moss-like lichens in the family Cladoniaceae. They are the primary food source for reindeer/caribou. ''Cladonia'' species are of economic importance to reindeer-herders, such as the Sami in Scandinavia or the Nenets ...

'' spezies.

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