Structure elucidation and NMR assignments of an alkaloid from <i>Ixeris chinensis</i> Nakai

<p>A new alkaloid, 2-amino-1,6-dihydro-pyridine-5-carbaldehyde (<b>1</b>), together with four known compounds, namely 4-hydroxybenzaldehyde (<b>2</b>), 4-hydroxyacetophenone (<b>3</b>), acetophenone-4-O-<i>β</i>-d-glucoside (<b>4</b>), 2-hydroxyl-6-methoxyacetophenone-4-O-<i>β</i>-d-glucoside (<b>5</b>), were isolated from the CHCl<sub>3</sub> extract from <i>Ixeris chinensis</i> Nakai. The structures of <b>1</b> was elucidated by spectroscopic methods, including UV, IR, HR-ESI-MS and extensive 1D and 2D NMR techniques.</p>