Abstract: By silica gel and Sephadex LH-20 column chromatography methods, seven compounds were isolated from the stem of Dendrobium devonianum, and identified by physicochemical prorerties and spectral data as neoliquirtin (1), 3,5-dihydroxyflavone-7-O-glucuronopyranoside (2), rutin (3), apigenin-7-O-α-L-rhamnopyranosyl (1→6)-β-D-glucuronopyranoside (4), apigenin-7-O-β-D-glucoside (5), β-daucosterol ( 6 ), and β-sitosterol (7). All the compounds are reported in Dendrobium devonianum for the first time.

Key words: Dendrobium devonianum, chemical constituents