*Generic Reference Type Author Year Title Secondary Title Volume Pages Publisher Secondary Author Notes Keywords Abstract Accession Number Journal Article Phi, K.;So, J.;Kim, J.;Koo, M.;Kim, J.;Kim, D.;Lee, J.;Lee, S.;Youn, U. 2023 Chemical constituents from the Antarctic lichen Usnea aurantiaco-atra and their chemotaxonomic significance Biochemical Systematics and Ecology 106 104581 1 1 https://doi.org/10.1016/j.bse.2022.104581 Chemical investigation of the Antarctic lichen Usnea aurantiaco-atra led to the isolation and identification of eight compounds, including a dibenzofuran derivative (1), three phenolics (2, 7, 8), a p-terphenyl (3), and three sterols (4-6). The structures of the isolated compounds (1-8) were elucidated by 1H and 13C NMR spectroscopic ana-lyses and comparisons with previously reported data. All compounds (1-8) were isolated from this species for the first time. The current study is also the first report of the identification of two compounds, pentamethoxy-p- terphenyl and 9,11-dehydroergosterol peroxide, from the Usnea genus. Meanwhile, the chemotaxonomic value of all isolates is also discussed in this paper. Usnea aurantiaco-atra, Antarctic lichen, Dibenzofuran, Sterol, p, -Terphenyl, antibacterial activities, phenolic-compounds, acid-derivatives, usnic, acid, antioxidant, metabolism, Biochemistry & Molecular Biology, Environmental Sciences & Ecology, Evolutionary Biology 35150