Steroidal and Phenolic Glycosides from the Bulbs of <em>Lilium pumilum</em> DC and Their Potential Na<sup>+</sup>/K<sup>+</sup> ATPase Inhibitory Activity

Abstract

A new steroidal saponin, named pumilum A (<strong>1</strong>), and a new phenolic glycoside, <em>threo</em>-1-(4′-hydroxy-2′-methoxyphenyl)-2-(2′′,4′′-dihydroxyphenyl)-1,3-propanediol-4′-<em>O</em>-<em>β</em>-D-glucopyranoside (<strong>7</strong>) were isolated from the methanolic extract of the bulbs of <em>Lilium pumilum</em> DC, along with five known steroidal saponins. Their chemical structures were elucidated on the basis of detailed spectroscopic analysis, including 1D and 2D NMR techniques and chemical methods. In addition, the inhibitory activity of all the isolates on Na⁺/K⁺ ATPase was evaluated.

Keywords

• &lt;em&gt;Lilium pumilum &lt;/em&gt;DC
• pumilum A
• Na&lt;sup&gt;+&lt;/sup&gt;/K&lt;sup&gt;+&lt;/sup&gt; ATPase