Abstract
Three new hetisine-type diterpenoid alkaloids, Guan-fu base V (GFV, 1), Guan-fu base W (GFW, 2) and Guan-fu base X (GFX, 3) were isolated from the roots of Aconitum coreanum (Lèvl.) Rapaics. Their structures were established by direct interpretation of their spectral data, mainly high resolution electrospray ionization mass spectrometry (HR-ESI-MS), 1D and 2D NMR (1H–1H COSY, ROESY, HSQC and HMBC). GFX is the third N-oxygenated hetisine-type diterpenoid alkaloid isolated from A. coreanum.
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