Anziaic acid is a depside found in lichens.

The two phenolic rings have a pentyl side chain.

[1] Anziaic acid works as an antibacterial compound by inhibiting topoisomerase.

[2][3] Anziaic acid has been artificially produced from olivetolic acid by benzylation of the O-phenol positions, and then condensing with trifluoroacetic anhydride.

[1] Anziaic acid is found in Parmeliaceae including Hypotrachyna,[2] Stereocaulon,[4] and Cetrelia,[5]