Three new compounds from <i>Dendrobium chrysanthum</i> Lindl.

The stems of <i>Dendrobium chrysanthum</i> Lindl. yielded three previously undescribed compounds, namely 2-(5-methyl-6-ethoxyphenyl)-flavone (<b>1</b>), a flavonoid; 3,12-dioxo-19-methoxy-friedelane (<b>2</b>), a triterpenoid; and (2'-methylpiperidine-7-ethenyl ester)-cinnamic acid (<b>3</b>), an alkaloid. Additionally, seven previously known compounds are newly recorded in this species, including phenylpropanoids (<b>4</b>), fatty acid derivatives (<b>5</b>), triterpenoids (<b>6</b> and <b>7</b>), and steroidal saponins (<b>8</b>-<b>10</b>). Structural elucidation of the new compounds was achieved through extensive spectroscopic techniques, including HR-ESI-MS,¹H and ¹³C-NMR, HSQC, and HMBC, supplemented by comparison with literature data. These findings enhance the phytochemical understanding of <i>D. chrysanthum</i> Lindl. and support its potential as a source of bioactive and structurally diverse natural products.