A new sesquiterpene isolated from Lindera aggregata (SIMS) KOSTERM
A new sesquiterpene, neolindenenonelactone (1), was isolated for the first time from the dried roots of Lindera aggregata (SIMS) KOSTERM., alongside four known compounds: linderane (2), isolinderalactone (3), linderalactone (4), and 8-hydroxylindestenolide (5). The chemical structures of these compounds were determined through spectral analysis, including fast atom bombardment mass spectrometry, one-dimensional nuclear magnetic resonance (NMR) spectroscopy, and two-dimensional NMR techniques such as (1)H-NMR, (13)C-NMR, distortionless enhancement by polarization transfer (DEPT), heteronuclear multiple-bond coherence (HMBC), as well as single-crystal X-ray diffraction.