Rahman, Mahfizur; Falck-Ytter, Anne B.; Antonsen, Øyvind G.; Strætkvern, Knut O. (Journal article; Peer reviewed, 2015)
Summary. Usnic acid (UA) was extracted at 1.5-1.9 % dry weight from samples of Cladonia stellaris, a carpet-forming lichen growing
abundantly in mountain areas in southeastern Norway. UA is known for its antibiotic activity ...