Results 171 to 180 of about 2,517,497 (197)

In vitro cytotoxic activities of (+)-usnic acid and (−)-usnic acid on V79, A549, and human lymphocyte cells and their non-genotoxicity on human lymphocytes

Natural Product Research, 2006
WOS: 000243586800005PubMed ID: 17393655This study investigates cytotoxic and genotoxic activities of (+)-Usnic acid and (-)-usnic acid isolated from the lichen Ramalina farinacea and the lichen Cladonia foliacea, respectively. To determine the activities
Koparal, Ayşe Tansu, Tüylü, Berrin, Türk, H.   +2 more
exaly   +2 more sources

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Synthesis and antimycobacterial activity of (+)‐usnic acid conjugates

Archiv der Pharmazie, 2018
AbstractNew therapeutics are urgently needed to fight tuberculosis and mycobacteria‐related diseases that are a major health hazard especially in poor countries. Natural products have been the source of important antitubercular drugs in the past and still need to receive attention as a potent reservoir of chemical structures. Fifteen known and two new (
Cirillo, Daniela, Borroni, Emanuele, Festoso, Irene, Monti, Diego, Romeo, Sergio, Mazier, Dominique, Verotta, Luisella   +6 more
openaire   +3 more sources

Elevational Trends in Usnic Acid Concentration of Lichen Parmelia flexilis in Relation to Temperature and Precipitation

Climate, 2017
Usnic acid contents in acetone extracts of 31 samples of lichen Parmelia flexilis collected from different altitudes were identified using thin layer chromatography (TLC) and determined by high performance liquid chromatography (HPLC).
Dinesh Chaudhary, Komal Malla, Bishnu Neupane, Anil Gautam, Sangita Timsina, Nirmala Jamarkattel, Sanjita Paudel   +6 more
exaly   +2 more sources

Studies in the usnic acid series. I. The condensation of (+)-usnic acid with aliphatic and aromatic amines

Canadian Journal of Chemistry, 1976
Detailed investigations concerned with the reaction of usnic acid (1) and dihydrousnic acid (14) with a variety of aliphatic and aromatic amines are described. Extensive analyses of the characteristic spectroscopic data allow structural assignments for all the isolated products.
James P. Kutney, Ignacio H. Sanchez
openaire   +1 more source

Usnic Acid

1967
TADEUSZ KORZYBSKI, ZUZANNA KOWSZYK-GINDIFER, WŁODZIMIERZ KURYŁOWICZ   +2 more
openaire   +2 more sources

Synthetic analogues of usnic acid

Tetrahedron Letters, 1969
D, Davis, J A, Elix
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USNIC ACID

1976
Darshan Ranganathan, Subramania Ranganathan   +1 more
openaire   +1 more source

ChemInform Abstract: USNIC ACID. XV. ALKALINE DEGRADATION OF USNIC ACID

Chemischer Informationsdienst, 1980
K. TAKAHASHI, M. TAKANI
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Review of Usnic Acid and Usnea Barbata Toxicity

Journal of Environmental Science and Health, Part C: Environmental Carcinogenesis and Ecotoxicology Reviews, 2008
Nan Mei, Qiang Shi, Jia-Long Fang
exaly  

The role of autophagy in usnic acid-induced toxicity in hepatic cells.

Toxicological Sciences, 2014
Yuanfeng Wu, Nan Mei, Si Chen
exaly