Ten new dihydroagarofuran sesquiterpene polyol esters, tripterdines A-J (1-10) were isolated from the stem and branch of Tripterygium wilfordii. The structures of new compounds were elucidated on the basis of extensive spectroscopic analyses, including UV, IR, HRESIMS, NMR, and CD exciton chirality method. The structures of compounds 1, 3, and 6 were confirmed by X-ray crystallographic analyses. The anti-inflammatory and cytotoxic activities were assessed for all the compounds (1-10). Compounds 3, 5 and 10 exhibited potent anti-inflammatory activities with the secretion level of TNF-α ranging from 43.86% to 51.27%, and the IL-6 ranging from 32.44% to 50.64%. In addition, compounds 1, 3, 7 and 9 showed weak cytotoxicities against three human tumor cell lines (Huh7, MCF-7 and HCT-116).
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http://dx.doi.org/10.1016/j.fitote.2022.105205 | DOI Listing |
Chem Pharm Bull (Tokyo)
October 2024
Faculty of Pharmaceutical Sciences, Tokushima Bunri University.
The MeOH extract from dried immature fruits of Euonymus sieboldianus (Celastraceae) plants yielded nineteen new β-dihydroagarofuran-type sesquiterpene polyesters. The structures of these compounds were established using NMR, MS spectroscopic analysis and chemical evidence.
View Article and Find Full Text PDFPhytochemistry
January 2025
College of Pharmacy, Chungbuk National University, Cheongju, 28160, Republic of Korea. Electronic address:
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.
View Article and Find Full Text PDFNat Prod Res
October 2024
Key Laboratory of Natural Products and High & New Technology Research Center, Henan Academy of Science, Zhengzhou, China.
Three new sesquiterpene polyol ester compounds angulatin V [1,15-diacetoxy-2-(α-methyl)-butanoyloxy-4α,6α-dihydroxy-8α-isobutanoyloxy-9-benzoxy--dihydroagarofuran], angulatin W [1,2-diacetoxy-4α,6α-dihydroxy-8-carbonyl-9-benzoxy-15-isobutanoyloxy--dihydroagarofuran], angulatin X [1,28α-triacetoxy-4α, 6α-dihydroxy-9-benzoxy-15-nicotinyl--dihydroagarofuran] (), together with one known compound Putterine B (), were isolated from the root bark of Maxim. The structures of compounds were elucidated by NMR, HRESIMS, IR data, and comparison with the literature data. The anti-inflammatory activity of all compounds was evaluated by measuring nitric oxide production in RAW264.
View Article and Find Full Text PDFJ Agric Food Chem
July 2024
College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, Shaanxi, P. R. China.
Pestic Biochem Physiol
May 2024
Laboratorio de Síntesis y Biotransformaciones, Departamento de Ciencias Básicas, Universidad del Bío-Bío, Chillán, Chile. Electronic address:
This work evaluated the insecticidal, antifeedant and AChE inhibitory activity of compounds with eudesmane skeleton. The insecticidal activity was tested against larvae of Drosophila melanogaster and Cydia pomonella, the compounds 3 and 4 were the most active (LC of 104.2 and 106.
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