Four New Eremophilane Derivatives from Ligularia sagitta
Four new compounds (<B>1a</B> and <B>2</B>–<B>4</B>), a series of uncommon eremophilane derivatives with C19-carbon skeleton, were isolated from the roots of <I>Ligularia sagitta</I> Maxim. Their structures were respectively determined by extensive spectroscopic analysis (IR, MS, NMR, and X-ray).
- Chemistry letters
Chemistry letters 37(3), 308-309, 2008-03-05
The Chemical Society of Japan