Chemistry Letters, Vol.37, No.3, 308-309, 2008
Four new eremophilane derivatives from Ligularia sagitta
Four new compounds (1a and 2-4), a series of uncommon eremophilane derivatives with C19-carbon skeleton, were isolated from the roots of Ligularia sagitta Maxim. Their structures were respectively determined by extensive spectroscopic analysis (IR, MS, NMR, and X-ray).