Results 61 to 70 of about 2,638 (179)

Aromatic Polyketides from a Symbiotic Strain Aspergillus fumigatus D and Characterization of Their Biosynthetic Gene D8.t287

Marine Drugs, 2020
The chemical investigation of one symbiotic strain, Aspergillus fumigatus D, from the coastal plant Edgeworthia chrysantha Lindl led to the isolation of eight compounds (1–8), which were respectively identified as rubrofusarin B (1), alternariol 9-O ...
Yi Hua, Rui Pan, Xuelian Bai, Bin Wei, Jianwei Chen, Hong Wang, Huawei Zhang   +6 more
doaj   +1 more source

Antimicrobial Effect of Spices and Their Phytochemicals: A Novel Approach to Overcoming Antibiotic Resistance

MedComm, Volume 7, Issue 4, April 2026.
This graphical abstract shows the antibacterial potential of phytochemicals from 15 spices, showcasing key compounds, their extraction methods, and mechanisms of action. It highlights membrane disruption, ROS generation, enzyme inhibition, and biofilm prevention as core antibacterial pathways.
Hettiyahandi Binodh De Silva, Yanqi Dai, Shervanthi Homer‐Vanniasinkam, Mohan Edirisinghe   +3 more
wiley   +1 more source

Convenient Replacement of the Hydroxy by an Amino Group in 4 Hydroxycoumarin and 4-Hydroxy-6-methyl-2-pyrone under Microwave Irradiation

Molecules, 2004
The reaction of 4-hydroxycoumarin (1) with some primary amines 2a-h and morpholine (2i) under microwave irradiation occurred without opening of the lactone ring to give N-substituted 4-aminocoumarins 3a-i in excellent yields.
Ivo C. Ivanov, Edmont V. Stoyanov
doaj   +1 more source

HPLC-DAD-ESI-QTOF-MS Determination of Bioactive Compounds and Antioxidant Activity Comparison of the Hydroalcoholic and Water Extracts from Two Helichrysum italicum Species

Metabolites, 2020
Mediterranean plant Helichrysum italicum represents a rich source of versatile bioactive compounds with potential benefits for human health. Despite extensive research on the plant’s active constituents, little attention has yet been paid to ...
Katja Kramberger, Darja Barlič-Maganja, Dunja Bandelj, Alenka Baruca Arbeiter, Kelly Peeters, Ana Miklavčič Višnjevec, Zala Jenko Pražnikar   +6 more
doaj   +1 more source

Bioactive Phytochemical Compounds in Medicago sativa L. (Alfalfa): A Systematic Review of Biological Properties and Therapeutic Relevance in Nutraceutical and Functional Food Implications

Food Frontiers, Volume 7, Issue 2, March 2026.
ABSTRACT Medicago sativa L. (alfalfa) harbors a remarkably diverse reservoir of bioactive secondary metabolites. Flavonoids, isoflavones, and triterpenoid saponins dominate its bioactivity landscape, driving potent antioxidant, anti‐inflammatory, antimicrobial, estrogenic, hypolipidemic, and cytotoxic actions through redox modulation, membrane ...
Parham Joolaei Ahranjani, Hamid Rashidi Nodeh, Zahra Esfandiari, Giovanna Ferrentino   +3 more
wiley   +1 more source

Main Ustilaginoidins and Their Distribution in Rice False Smut Balls

Toxins, 2015
Rice false smut has become an increasingly serious fungal disease in rice (Oryza sativa L.) production worldwide. Ustilaginoidins are bis-naphtho-γ-pyrone mycotoxins previously isolated from the rice false smut balls (FSBs) infected by the pathogen ...
Jiajia Meng, Weibo Sun, Ziling Mao, Dan Xu, Xiaohan Wang, Shiqiong Lu, Daowan Lai, Yang Liu, Ligang Zhou, Guozhen Zhang   +9 more
doaj   +1 more source

Production of New Antibacterial 4-Hydroxy-α-Pyrones by a Marine Fungus Aspergillus niger Cultivated in Solid Medium

Marine Drugs, 2019
Four 4-hydroxy-α-pyrones including three new ones named nipyrones A−C (1−3) together with one known analogue germicidin C (4) were discovered from a marine sponge-derived fungus Aspergillus niger cultivated in a solid rice culture. Their
Lijian Ding, Lu Ren, Shuang Li, Jingjing Song, Zhiwen Han, Shan He, Shihai Xu   +6 more
doaj   +1 more source

Diastereo- and Enantioselective Inverse-Electron-Demand Diels-Alder Cycloaddition between 2-Pyrones and Acyclic Enol Ethers. [PDF]

Angew Chem Int Ed Engl, 2022
Huang G, Guillot R, Kouklovsky C, Maryasin B, de la Torre A.   +4 more
europepmc   +1 more source

Alkynyl triazenes enable divergent syntheses of 2-pyrones. [PDF]

Chem Sci, 2021
Tan JF, Bormann CT, Severin K, Cramer N.
europepmc   +1 more source

A formal [3 + 3] cycloaddition of allenyl imide and activated ketones for the synthesis of tetrasubstituted 2-pyrones. [PDF]

RSC Adv, 2021
Wang YH, Zhang DH, Cao ZH, Li WL, Huang YY.   +4 more
europepmc   +1 more source