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Seven previously undescribed dihydro-β-agarofurans (1-7) together with 28 known compounds were isolated from Celastrus orbiculatus fruits using LC-MS/MS-based molecular networking-guided purification. Their structures were elucidated through 1D and 2D-NMR, HRESIMS analysis, and ECD quantum chemical calculations. The inhibitory effects of all isolated compounds on α-MSH-induced melanin production in B16F0 melanoma cells were tested. Compounds 1, 11, 12, 19-21, 23, 29, 31, 34, and 35 showed significant inhibitory effects on melanin production with IC values ranging from 11.3 to 30.1 μM.
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http://dx.doi.org/10.1016/j.phytochem.2024.114312 | DOI Listing |
Int J Mol Sci
August 2025
Department of Food Science and Technology, Pusan National University, Miryang 50463, Republic of Korea.
Bee pollen is a primary and secondary metabolite-rich natural product collected by pollinators such as honeybees. Polyphenols, particularly flavonoids, are well known for their potent antioxidant activities. Numerous phytochemical and biological studies have focused on , a member of the Fagaceae family.
View Article and Find Full Text PDFACS Omega
August 2025
College of Pharmacy, Chungbuk National University, Cheongju 28160, Republic of Korea.
A comparative analysis of UPLC-DAD and MS chromatograms revealed distinct chemical profiles between the methanolic extracts of the branch and cortex of . MS/MS-based molecular networking further identified unique molecular features present in the branch extract, which facilitated the targeted isolation of five previously undescribed lignan derivatives. The structures of these compounds were elucidated using 1D and 2D NMR spectroscopy, along with high-resolution mass spectrometry (HRMS).
View Article and Find Full Text PDFFitoterapia
August 2025
UMR 7200 Laboratoire d'Innovation Thérapeutique (LIT), CNRS, Strasbourg Drug Discovery and Development Institute (IMS), Université de Strasbourg, 67400 Illkirch-Graffenstaden, France. Electronic address:
The use of plant-based remedies in traditional medecine to combat bacterial infections has been scientifically studied. As part of an ongoing research for the discovery of new therapeutic options to treat bacterial infections, Ammoniacum gum resin from Ferula communis L. roots was explored.
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September 2025
Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy/State Key Laboratory of Bioactive Molecules and Druggability Assessment/International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Ministry of Education (MOE
This study described the isolation and structural characterization of four novel linearly fused prenylated indole diketopiperazine alkaloids (1-4) alongside four known analogues from the marine-derived fungus Aspergillus sp. MG35-18, guided by LC-MS/MS-based molecular networking. These compounds are characterized with a rare [3,2-f] indole-pyrano fused ring system.
View Article and Find Full Text PDFACS Chem Biol
July 2025
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
Antibiotic resistance poses a severe threat to human health, necessitating research into antibiotics with unique mechanisms to combat drug resistance. Natural siderophores and their synthetic derivatives have become a promising resource for the development of anti-infectious agents. In this study, we introduce a new anti-infective agent with a mode of action that enhances host immunity without exerting direct antibacterial activity.
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