ArticleChemistry & biodiversity2026
Diverse Sesquiterpenoids From the Aerial Parts of Inula japonica Thunb. and Their Cytotoxic Activities.
Article in Chemistry & biodiversity, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Three previously undescribed sesquiterpenoids, named inujaponins J-L (1, 3, and 4), were isolated from the aerial parts of Inula japonica Thunb., together with nine known sesquiterpenoids (2 and 5-12). The structures of the new sesquiterpenoids were characterized using high-resolution mass spectrometry and comprehensive one-dimensional and two-dimensional nuclear magnetic resonance (NMR) analyses. Additionally, the absolute configurations of 1, 3, and 4 were determined by comparing the experimental and calculated electronic circular dichroism spectra. Furthermore, the carbon-13 NMR data for 5 and 6 are reported for the first time in the present study. Structurally, inujaponin J was a rare presilphiperfolane sesquiterpenoid possessing a 5/5/6 tricyclic system, inujaponin K was an ivaxillarane sesquiterpenoid containing a 3/5/6 tricycle carbon skeleton, and inujaponin L was an eremophilane sesquiterpenoid possessing an α-substituted acrylic acid unit. Compounds 6, 7, and 12 had remarkable cytotoxic activities against K-562, A-549, HepG-2, MDA-MB-231, and SW-480 cancer cell lines with IC
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