Results 21 to 30 of about 1,182 (166)

Two New Fumarprotocetraric Acid Lactones Identified and Characterized by UHPLC-PDA/ESI/ORBITRAP/MS/MS from the Antarctic Lichen Cladonia metacorallifera

Separations, 2022
Lichens are symbiotic organisms between algae and fungi, which are makers of secondary compounds named as lichen substances. Hyphenated techniques have significantly helped natural product chemistry, especially UHPLC/ESI/MS/MS in the identification ...
Beatriz Sepúlveda, Alberto Cornejo, Daniela Bárcenas-Pérez, José Cheel, Carlos Areche   +4 more
doaj   +1 more source

A Photochemical Entry to Depsides: Synthesis of Gustastatin. [PDF]

ChemInform, 2005
Herein, we propose a modular and general strategy to construct orcinol-type depsides based on the photolysis of functionalized benzodioxinones (I). Notably, resorcinylic esters are obtained without competing isocoumarin (II) formation, exemplified by the first total synthesis of gustastatin in 10 steps from commercially available trihydroxybenzoic acid.
Jorge, García-Fortanet, John R, Debergh, Jef K, De Brabander   +2 more
openaire   +2 more sources

UHPLC-MS Metabolomic Fingerprinting, Antioxidant, and Enzyme Inhibition Activities of Himantormia lugubris from Antarctica

Metabolites, 2022
Himantormia lugubris is a Chilean native small lichen shrub growing in the Antarctica region. In this study, the metabolite fingerprinting and the antioxidant and enzyme inhibitory potential from this species and its four major isolated compounds were ...
Carlos Areche, Javier Romero Parra, Beatriz Sepulveda, Olimpo García-Beltrán, Mario J. Simirgiotis   +4 more
doaj   +1 more source

Anti-Osteoclastogenic and Antibacterial Effects of Chlorinated Polyketides from the Beibu Gulf Coral-Derived Fungus Aspergillus unguis GXIMD 02505

Marine Drugs, 2022
One new depsidone derivative, aspergillusidone H (3), along with seven known biosynthetically related chlorinated polyketides, were obtained from the Beibu Gulf coral-derived fungus Aspergillus unguis GXIMD 02505.
Yanting Zhang, Zhichao Li, Bingyao Huang, Kai Liu, Shuai Peng, Xinming Liu, Chenghai Gao, Yonghong Liu, Yanhui Tan, Xiaowei Luo   +9 more
doaj   +1 more source

Secondary Metabolites Diversity of Aspergillus unguis and Their Bioactivities: A Potential Target to Be Explored

Biomolecules, 2022
Aspergillus unguis belongs to the Aspergillus section Nidulantes. This species is found in soils and organisms from marine environments, such as jellyfishes and sponges. The first chemical study reported in the literature dates from 1970, with depsidones
Levy Tenório Sousa Domingos, Raquel dos Santos Martins, Leonardo Melo de Lima, Angela Michelato Ghizelini, Antonio Ferreira-Pereira, Fernando Cotinguiba   +5 more
doaj   +1 more source

Depside and Depsidone Synthesis in Lichenized Fungi Comes into Focus through a Genome-Wide Comparison of the Olivetoric Acid and Physodic Acid Chemotypes of Pseudevernia furfuracea

Biomolecules, 2021
Primary biosynthetic enzymes involved in the synthesis of lichen polyphenolic compounds depsides and depsidones are non-reducing polyketide synthases (NR-PKSs), and cytochrome P450s.
Garima Singh, Daniele Armaleo, Francesco Dal Grande, Imke Schmitt   +3 more
doaj   +1 more source

Four New Depsides Isolated from Salvia miltiorrhiza and Their Significant Nerve-Protective Activities

Molecules, 2018
By investigating of the roots of Salvia miltiorrhiza, which is one of the most widely used Chinese herbs, we used phytochemical methods successfully to obtain twelve depsides: four depsides (1⁻4) that were previously undescribed, along with eight ...
Qinghao Jin, Xinyi Hu, Yanping Deng, Jinjun Hou, Min Lei, Hongjian Ji, Jing Zhou, Hua Qu, Wanying Wu, Dean Guo   +9 more
doaj   +1 more source

Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis

Molecules, 2021
The present study provides new data concerning the chemical characterisation of Physcia mediterranea Nimis, a rare Mediterranean species belonging to the family Physciaceae. The phytochemical screening was carried out using GC-MS, HPLC-ESI-MS-MS, and NMR
Marwa Kerboua, Monia Ali Ahmed, Nsevolo Samba, Radhia Aitfella-Lahlou, Lucia Silva, Juan F. Boyero, Cesar Raposo, Jesus Miguel Lopez Rodilla   +7 more
doaj   +1 more source

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   +1 more source

The Impact of Different Cultivation Systems on the Content of Selected Secondary Metabolites and Antioxidant Activity of Carlina acaulis Plant Material

Molecules, 2019
Roots and leaves of Carlina acaulis L. are still used in ethnomedicine in many European countries; however, the limited occurrence of the plants and protection of this species necessitate a search for alternative ways for obtaining this plant material ...
Maciej Strzemski, Sławomir Dresler, Ireneusz Sowa, Anna Czubacka, Monika Agacka-Mołdoch, Bartosz J. Płachno, Sebastian Granica, Marcin Feldo, Magdalena Wójciak-Kosior   +8 more
doaj   +1 more source