Thirteen compounds were isolated from the stems of Dendrobium moniliforme. They were identified as heptacosane (1), octacosanyl hexadecanoate (2), methyl and ethyl linolenates (3a, 3b), 4-methoxybenzaldehyde (4), alkyl ferulates .(5), vanillin (6), alkyl 4'-hydroxy-cis-cinnamates (7), denbinobin (8), alkyl 4' -hydroxy- trans-cinnamates (9), stigmast-4-en-3-one (10), phytosterols (11 a, 11 b, 11c), linoleic acid (12) and heptatriaconsanoic acid (13). Compounds 2, 3a, 3b, 4, and 12 were isolated from Dendrobium species for the first time.