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Covering: up to 2018 Even today, when planar structures of natural products can be determined with microgram samples, the configurational assignment continues to be a challenge. The relative and absolute configurations of natural products can be assigned by devising original approaches, relying on carefully acquired data on a case-by-case basis. In this review, the most widely available methods and techniques for the absolute configuration determination of novel natural products are concisely discussed. Selected illustrative examples (case studies) are presented, where original approaches integrating different chemical, spectroscopic, and/or computational methods have been devised to solve intriguing stereochemistry issues of natural small molecules.
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http://dx.doi.org/10.1039/c8np00053k | DOI Listing |
J Trace Elem Med Biol
September 2025
Department of Neurobiology, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, Kraków 31-343, Poland. Electronic address:
Vanadium (V) is a trace element in the environment; it is detected in soil, water, air, dust, and food products. V-containing compounds have shown therapeutic potential in the treatment of diabetes. However, studies on the effects of V on animal behavior remain limited and sporadic.
View Article and Find Full Text PDFJMIR Public Health Surveill
September 2025
Center of Indigenous Health Care, Department of Community Health, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung, Taiwan.
Background: The COVID-19 pandemic has devastated economies and strained health care systems worldwide. Vaccination is crucial for outbreak control, but disparities persist between and within countries. In Taiwan, certain indigenous regions show lower vaccination rates, prompting comprehensive inquiries.
View Article and Find Full Text PDFJ Agric Food Chem
September 2025
Laboratory of Food Proteins and Colloids, School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China.
Soy protein remains a key component of plant-based food development, but its application is challenged by inherent allergenicity. Previous work identified that native amyloid-like protein aggregates in soy 7S globulin that resist gastrointestinal digestion and exhibit pronounced antigenicity. Herein, we demonstrate that protein deamidation significantly enhances proteolysis under an infant gastrointestinal digestion model, leading to ∼80 and 50% reductions in IgG- and IgE-binding capacities, respectively.
View Article and Find Full Text PDFJ Nat Prod
September 2025
Green Pharmaceutical Technology Key Laboratory of Luzhou City, School of Pharmacy, Southwest Medical University, Luzhou 646000, P. R. China.
Hamigerans, a class of diterpenoid natural products isolated from marine sponge , are characterized by distinctive 6-6-5 or 6-7-5 tricyclic skeletons. These compounds have been a focal point for synthetic chemists in recent years due to their remarkable biological activities. In this Review, we summarize the progress made in the isolation, biosynthesis, bioactivity, and total synthesis of hamigerans, with particular emphasis on synthetic studies published since 2013.
View Article and Find Full Text PDFJ Phys Chem B
September 2025
National Research Institute of Chinese Medicine, Ministry of Health and Welfare, Taipei 11221, Taiwan, ROC.
The synthesis of -tetrakis(3,4,5-trimethoxyphenyl)porphyrin [HT(3,4,5-OCH)PP] and cobalt(II) -tetrakis(3,4,5-trimethoxyphenyl)porphyrin [Co(T(3,4,5-OCH)PP)] has been successfully accomplished. The oxidation properties of [Co(T(3,4,5-OCH)PP)] have been assessed through UV-vis, NMR, and EPR techniques. It can be seen in the UV-vis spectrum that adding SbCl caused extra peaks to appear at 674 nm, which means that a π-cation radical was formed.
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