It is used as primary and secondary intermediate.
K. Ingólfsdóttir. Usnic acid. Phytochemistry. 2002, 61 (7),729-736.
Moreno Cocchietto.; Nicola Skert.; Pier Nimis.; Gianni Sava. A review on usnic acid, an interesting natural compound. Naturwissenschaften. 2002, 89 (4),137-146.
Hazard Statements: H302
Harmful if swallowed.
Precautionary Statements: P264-P270-P301+P312a-P330-P501a
Wash thoroughly after handling. Do not eat, drink or smoke when using this product. IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell. Rinse mouth. Dispose of contents/container in accordance with local/regional/national/international regulations.