Results 21 to 30 of about 1,481 (197)

Rosarugosides A and D from Rosa rugosa Flower Buds: Their Potential Anti-Skin-Aging Effects in TNF-α-Induced Human Dermal Fibroblasts [PDF]

Plants
This present study investigated the anti-skin-aging properties of Rosa rugosa. Initially, phenolic compounds were isolated from a hot water extract of Rosa rugosa’s flower buds. Through repeated chromatography (column chromatography, MPLC, and prep HPLC),
Kang Sub Kim, So-Ri Son, Yea Jung Choi, Yejin Kim, Si-Young Ahn, Dae Sik Jang, Sullim Lee   +6 more
doaj   +2 more sources

Efficient Production of Some Bioactive Depsides and Simple Phenolic Acids by Microshoots of Aronia × Prunifolia (Purple Aronia) Agitated Cultures as the Result of Feeding Strategy with Four Different Biogenetic Precursors [PDF]

Molecules
A precursor feeding strategy was used for the first time in agitated microshoot cultures of Aronia × prunifolia. This strategy involved the addition of biogenetic precursors of simple phenolic acids (phenylalanine, cinnamic acid, and benzoic acid) and ...
Paweł Kubica, Agnieszka Szopa, Adam Setkiewicz, Halina Ekiert   +3 more
doaj   +2 more sources

Imbricaric acid and perlatolic acid: multi-targeting anti-inflammatory depsides from Cetrelia monachorum. [PDF]

PLoS ONE, 2013
In vitro screening of 17 Alpine lichen species for their inhibitory activity against 5-lipoxygenase, microsomal prostaglandin E2 synthase-1 and nuclear factor kappa B revealed Cetrelia monachorum (Zahlbr.) W.L. Culb. & C.F. Culb.
Sarah K Oettl, Jana Gerstmeier, Shafaat Y Khan, Katja Wiechmann, Julia Bauer, Atanas G Atanasov, Clemens Malainer, Ezzat M Awad, Pavel Uhrin, Elke H Heiss, Birgit Waltenberger, Daniel Remias, Johannes M Breuss, Joel Boustie, Verena M Dirsch, Hermann Stuppner, Oliver Werz, Judith M Rollinger   +17 more
doaj   +3 more sources

QSAR Analysis of Lichen Depsides and Derivatives: Electronic Descriptors as Predictors of Antioxidant Activity via PLS-1 [PDF]

Antioxidants
The antioxidant activity of natural and semi-synthetic depsides and benzofurans—including R-(+)-usnic acid (1), dibenzoyl usnic acid (2), atranorin (3), 2,4-bis(benzoyloxy)atranorin (4), 4-O-methyl atranorin (5), decarboxythamnolic acid (6), thamnolic ...
Patricia Mollinedo, José Luis Vila, Paola Nogales-Ascarrunz, Luis Apaza Ticona   +3 more
doaj   +2 more sources

Cytotoxic and cytostatic activity of orcinol-type depsides of lichens [PDF]

Учёные записки Санкт-Петербургского государственного медицинского университета им. Акад. И.П. Павлова
Lichens synthesize unique secondary metabolites, most of which are not found in other living organisms. More than 800 such metabolites are known, which can be found in various parts of the lichen thallus.
I. A. Prokopyev, U. A. Kremenetskaya, O. S. Shemchuk, P. K. Kozhukhov, O. E. Molchanov, D. N. Maistrenko, K. N. Semenov, V. V. Sharoyko   +7 more
doaj   +2 more sources

Depsides: lichen metabolites active against hepatitis C virus. [PDF]

PLoS ONE, 2015
A thorough phytochemical study of Stereocaulon evolutum was conducted, for the isolation of structurally related atranorin derivatives. Indeed, pilot experiments suggested that atranorin (1), the main metabolite of this lichen, would interfere with the ...
Thi Huyen Vu, Anne-Cécile Le Lamer, Claudia Lalli, Joël Boustie, Michel Samson, Françoise Lohézic-Le Dévéhat, Jacques Le Seyec   +6 more
doaj   +2 more sources

Synthesis of the lichen depsides pseudocyphellarin A and B

Australian Journal of Chemistry, 1984
The total synthesis of the fully substituted lichen depsides, pseudocyphellarin A (3-hydroxy-4-methoxycarbonyl-2,5,6-trimethylphenyl 3-formyl-2,4-dihydroxy-5,6-dimethylbenzoate) (1) and pseudocyphellarin B (3-hydroxy-4-methoxycarbonyl-2,5,6-trimethylphenyl 2,4-dihydroxy-3-hydroxymethyl-5,6-dimethylbenzoate) (2) is described.
JA Elix, L Lajide
openaire   +2 more sources

Unveiling the therapeutic potential of Lobaria extract and its depsides/depsidones in combatting Aβ42 peptides aggregation and neurotoxicity in Alzheimer’s disease [PDF]

Frontiers in Pharmacology
Background: The development of effective inhibitors that can inhibit amyloid β (Aβ) peptides aggregation and promote neurite outgrowth is crucial for the possible treatment of Alzheimer’s disease (AD).
Meixia Yang, Meixia Yang, Caishan Yan, Dusadee Ospondpant, Dusadee Ospondpant, Lisong Wang, Shengying Lin, Shengying Lin, Wai Lun Tang, Wai Lun Tang, Tina Tingxia Dong, Tina Tingxia Dong, Penger Tong, Qin Xu, Karl Wah Keung Tsim, Karl Wah Keung Tsim   +15 more
doaj   +2 more sources

New reagents for the synthesis of depsides

Tetrahedron, 1965
Lichen depsides have now been synthesized by making use of two reagents, dicyclohexyl-carbodiimide (DCC) and trifluoroacetic anhydride. Methyl evernate, methyl lecanorate and evernic acid have been prepared in satisfactory yields.
S. Neelakantan, R. Padmasani, T.R. Seshadri   +2 more
openaire   +2 more sources

Synthesis of para -olivetol depsides

Australian Journal of Chemistry, 1974
The unambiguous synthesis of the lichen depsides, anziaic, perlatolic, 2'- O -methylanziaic, 2- O - methylperlatolic, 2'- O -methylperlatolic, 4- O -demethylplanaic, planaic, imbricaric and stenosporic acids is reported. Where necessary the phenolic and carboxy groups of the intermediate phenols were protected by O -benzylation until after the depside ...
JA Elix
openaire   +2 more sources