Abstract
A new cembrane-type diterpenoid (1) and 9 known cembranoids (2-10) were isolated from the leaves of Nicotiana tabacum. The structure of the new metabolite was confirmed by extensive analyses of their spectroscopic data, including high-resolution electrospray ionization mass spectrometry (HR-ESI-MS), 1D- and 2D nuclear magnetic resonance (NMR) spectroscopy, and infrared spectroscopy (IR). All of the isolated compounds were tested for their protective effects against oxygen-glucose deprivation (OGD)-induced neurotoxicity in SH-SY5Y cells. The new compound 1 exhibited a moderate protective effect against OGD-induced neurotoxicity at 10 μM.
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