A New Phenolic Compound from Dendrobium longicornu

摘要

The stems of several Dendrobium species (Orchidaceae) are used as "Shi-Hu" in traditional Chinese medicine mainly for the good of throat and immune ability. D. longicornu belongs to Sect. Formosae of Dendrobium species and mainly distributed in southwest of China, and chemical research of this Sect, plant is not common. First chemical report of this species at 2004 described five new phenolic compounds, and continual experiments of the species lead to the isolation of an interesting new phenolic compound (1) having an oxepine parent nucleus, together with three known compounds, trigonopol A (2), β-sito-sterol and daucosterol. To the best of our knowledge, it is the first time for the isolation of this kind of compound from Dendrobium species. This paper describes the isolation and structural elucidation of the new compound 1.