a.1.(Chem.) Pertaining to, or designating, an organic acid which is obtained from several varieties of lichen (Lecanora, Roccella, etc.), as a white, crystalline substance, and is called also orsellic acid, diorsellinic acid, lecanorin, etc.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
Mentioned in ?
References in periodicals archive ?
Lecanoric acid, a secondary lichen substance with antioxidant properties from Umbilicaria antarcticain maritime Antarctica (King George Island).
The compounds which resulted in the above PTP1B inhibitory activity were identified as triterpenoid, zeorin (hopane-6[alpha],22-diol), monocyclic aromatic compounds as methyl-[beta]-orcinol carboxylate (atraric acid), methylorsellinate, methyl haematommate, depsides lecanoric acid, gyrophoric acid, atranorin, brialmontin 1, and depsidone lobaric acid along with four new diterpene furanoids.
In an another study, ethyl haematommate, ethyl orsellinate, lecanoric acid, and gyrophoric acid had shown antiglycation activity [42].
Antimicrobial activity of fumarprotocetraric acid, lecanoric acid, protocetraric acid and stictic acid isolated from different species of lichen.
As part of our study of lichens from the Cerrado biome in Mato Grosso do Sul state, Midwest Brazil, the present article reports novel findings on the radical-scavenging activity of two depsides (atranorin and lecanoric acid), five depsidones (protocetraric, hypostictic, norstictic, salazinic, and psoromic acids), usnic acid, lichexanthone, and derivatives of 9'-O-alkyl protocetraric acid.
The depsides atranorin (1) and lecanoric acid (3), the depsidones protocetraric (2), salazinic (6), hypostictic (7) norstictic (8), and psoromic (9) acids, the xanthone lichexanthone (5), and usnic acid (4) isolated from lichen species were evaluated for their free-radical-scavenging activity towards 2,2'-diphenyl-1-picrylhydrazyl (DPPH, a stable free radical) at 0.1 and 0.3 mM concentrations.
hossei Atranorin - Lecanoric acid - Usnic acid + Sekikaic acid + Salanizic acid - Terpenoids + Tannins + Saponins - Flavonoids - Steroids - Table 2: Antifungal activity of solvent extracts of R.
For example, antioxidant activity was found for lecanoric acid, salazinic acid, stictic acid, usnic acid (Luo et al.
The depsides (atranorin, diffractaic and lecanoric acids), depsidones (protocetraric, salazinic, hypostictic and norstictic acids), xanthones (lichexanthone and secalonic acid), and usnic acid, as well seven orsellinic acid esters, five salazinic acid 8',9'-0-alkyl derivatives and four lichexanthone derivatives, were evaluated for their activity against Mycobacterium tuberculosis.
Another supportive report also emphasizes the correlation between antioxidative capacity and phenolic constituents, particularly methyl orsenillate, orsenillic acid, atranorin and lecanoric acid (Jayaprakasha and Rao, 2000).