Three new compounds from Dendrobium chrysanthum Lindl.

The stems of Dendrobium chrysanthum Lindl. yielded three previously undescribed compounds, namely 2-(5-methyl-6-ethoxyphenyl)-flavone (1), a flavonoid; 3,12-dioxo-19-methoxy-friedelane (2), a triterpenoid; and (2'-methylpiperidine-7-ethenyl ester)-cinnamic acid (3), an alkaloid. Additionally, seven previously known compounds are newly recorded in this species, including phenylpropanoids (4), fatty acid derivatives (5), triterpenoids (6 and 7), and steroidal saponins (8-10). 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 D. chrysanthum Lindl. and support its potential as a source of bioactive and structurally diverse natural products.