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The article offers information on the chemical components of Eria spicata, an orchid plant collected from Lianghe in Yunnan Province, China. It presents the plant's isolation processes and the structures of the compounds that was identified from Eria spicata after a chemical research was performed by professor Hong Yu of Yunnan University. Moreover, it mentions the eight natural compounds that was identified from the plant including the nigtrogen-oxide hordenine, nudol, and erianol.

Abstract: Angiopteris species (Angiopteridaceae) have been widely used in traditional Chinese medicine to treat many diseases. A. esculenta Ching was endemic to north-west of Yunnan Province, China, its rhizomes were used as a foodstuff by the local people for the extraction of starch. From the extracts of the aerial parts of the plant, two new natural lactones (5R,6R)-5,6-dihydro-5-hydroxy-6-methyl-2H-pyran-2-one (1) and (5R,6R)-5-(1-hydroxyethyl)-2(5H)-furanone (2), two known lactones, (5R,6R)-5-(1-hydroxyethyl)-dihydro-2-furanone (3) and angiopteroside (4), and six known compounds, coumarin (5), 5-(hydroxymethyl)furfural (6), 9(11)-fernene (7), β-sitosterol (8), d-fucose (9) and l-arabinose (10) were isolated and identified by using combination of mass spectrometry and various 1D and 2D NMR techniques. This is the first report of the chemical constituents of A. esculenta. [Copyright &y& Elsevier]