Results 41 to 50 of about 2,277 (193)

The Role of Secondary Metabolites and Bark Chemistry in Shaping Diversity and Abundance of Epiphytic Lichens

Frontiers in Forests and Global Change, 2022
Diversity of secondary lichen metabolites was studied in epiphytic lichens on six phorophytes—spruce, pine, birch, alder, aspen and poplar in the Middle Urals of Russia. Atranorin, usnic, fumarprotocetraric acid, zeorin, and gyrophoric acid were found in
Alexander Paukov, Anzhelika Teptina, Alexander Ermoshin, Ekaterina Kruglova, Lada Shabardina   +4 more
doaj   +1 more source

New depside from Citrus reticulata Blanco

Natural Product Research, 2014
A new depside, named depcitrus A (1), and 31 known compounds were isolated from the peels, leaves and branch barks of Citrus reticulata Blanco. Methylation of the high polarity fractions from the branch barks and peels gave one new methylated compound named depcitrus B (14) and five known compounds.
Uraiwan, Phetkul, Souwalak, Phongpaichit, Ramida, Watanapokasin, Wilawan, Mahabusarakam   +3 more
openaire   +2 more sources

Characterization of the depsidone gene cluster reveals etherification, decarboxylation and multiple halogenations as tailoring steps in depsidone assembly

Acta Pharmaceutica Sinica B, 2023
Depsides and depsidones have attracted attention for biosynthetic studies due to their broad biological activities and structural diversity. Previous structure‒activity relationships indicated that triple halogenated depsidones display the best anti ...
Jiafan Yang, Zhenbin Zhou, Yingying Chen, Yongxiang Song, Jianhua Ju   +4 more
doaj   +1 more source

Исследование состава антоцианов травы Ocimum Basilicum L. В рамках научного направления "Фармацевтический ремейк" [PDF]

, 2016
В статье представлены результаты исследования состава антоцианов. В ходе хроматографического анализа травы Ocimum basilicum L. было установлено присутствие двенадцати антоциановых гликозидов.
Крикун, Е. Н., Малютина, А. Ю., Новикова, М. Ю., Писарев, Д. И., Севрук, И. А.   +4 more
core   +2 more sources

Cytotoxic and cytostatic activity of orcinol-type depsides of lichens

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   +1 more source

Caffeic Acid Derivatives from Eupatorium perfoliatum L.

Molecules, 2008
From the ethyl acetate soluble fraction of a methanol/water extract of the herb Eupatorium perfoliatum L. (Asteraceae) six caffeic acid derivatives have been isolated and identified by 1D- and 2D-NMR spectroscopic data.
Andreas Hensel, Frank Petereit, Mareike Maas   +2 more
doaj   +1 more source

Phylogenetic Studies and Metabolite Analysis of Sticta Species from Colombia and Chile by Ultra-High Performance Liquid Chromatography-High Resolution-Q-Orbitrap-Mass Spectrometry

Metabolites, 2022
Eleven species of lichens of the genus Sticta, ten of which were collected in Colombia (S. pseudosylvatica S. luteocyphellata S. cf. andina S. cf. hypoglabra, S. cordillerana, S. cf. gyalocarpa S. leucoblepharis, S. parahumboldtii S.
Laura Albornoz, Alfredo Torres-Benítez, Miguel Moreno-Palacios, Mario J. Simirgiotis, Saúl A. Montoya-Serrano, Beatriz Sepulveda, Elena Stashenko, Olimpo García-Beltrán, Carlos Areche   +8 more
doaj   +1 more source

Oxidation reactions are required to produce atranorin from acetate by alginate-immobilized cells of Cladonia verticillaris. [PDF]

, 2000
Atranorin, a p-depside of the b-orcinol series, is produced by several Cladonia species. Immobilized cells of Cladonia verticillaris in calcium alginate are able to produce atranorin when they are supplied with 1.0 mM acetate as a precursor.
Fontaniella, B., Pereira, E.C., Sebastián, B., Vicente, C.   +3 more
core  

The structures of eleven (4-phenyl)piperazinium salts containing organic anions [PDF]

, 2022
Eleven (4-phen­yl)piperazinium salts containing organic anions have been prepared and structurally characterized, namely, 4-phenyl­piperazin-1-ium 4-fluoro­benzoate monohydrate, C10H15N2+·C7H4FO2−·H2O, 1; 4-phenyl­piperazin-1-ium 4-bromo­benzoate ...
Archana, S. D., Butcher, Ray J., Foro, Sabine, Kiran Kumar, H., Yathirajan, H. S.   +4 more
core   +2 more sources

Redirecting a Fungal Quercetin 2,3‐Dioxygenase Toward Artificial Flavonols

ChemCatChem, Volume 18, Issue 6, 27 March 2026.
A novel quercetin 2,3‐dioxygenase was engineered to reshape its substrate‐binding cavity and redirect its specificity toward artificial flavonols. One variant with a larger substrate‐binding cavity exhibited 20‐ to 1750‐fold higher activity toward bulky flavonols with phenyl‐based substitutions at position C‐8.
Michael Kotik, Natalia Kulik, Stanislav Musil, Petr Halada, Lucie Petrásková, Andrea Ramundo, Tatsiana Charnavets, Martina Hurtová, Vladimír Křen, Kateřina Valentová   +9 more
wiley   +1 more source