usnic acid


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usnic acid

(ŭs′nĭk)
n.
An antibacterial substance, C18H16O7, obtained from lichens of several genera, including Usnea.
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With the exception of usnic acid, atranorin, physodic acid and perlatolic acid showed no difference in
The phytotoxic lichen metabolite, usnic acid, is a potent inhibitor of plant p- hydroxyphenylpyruvate dioxygenase.
Antiviral, antiprotozoal, antiproliferative, analgesic, anti-inflammatory and antipyretic activities of usnic acid known as secondary metabolite have been reviewed.
Usnic acid was initially used in the treatment of pulmonary tuberculosis (Plichet, 1955), and there are data regarding its biological activities as an antibiotic (Cocchietto et al.
In this study, secondary metabolites namely usnic acid and sekikaic acid are reported to be present in the lichen.
but the latter contains methyplacodiolic and usnic acids, and ascospores with 7-10 septa (Staiger & Kalb, 1995).
And still others--ephedra, usnic acid, kava--can be dangerous.
Among the known constituents of usnea are usnic acid, protolichesterinic acid, and oreinol derivatives.
For the first time, the researchers can explain how usnic acid is toxic to plants (phytotoxicity).
The research collaboration will assess the ability of various dietary supplements, including black cohosh, green tea, ginko biloba, kava, usnic acid and potentially others, to affect various drug transporters.
Undoubtedly usnic acid is the most studied lichen substance, which is present as two enantiomers: (-)-usnic acid 54 and (+)-usnic acid 55.
The usnic acid it contains is a potent antibiotic and antifungal agent.