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[Studies on phenanthrene constituents from stems of Dendrobium candidum]
Rong-sheng Li1, Xin Yang, Ping He
1Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
Objective:
To investigate chemical constituents from the stems of Dendrobium candidum.
Methods:
The constituents were isolated by various column chromatography methods, and their structures were elucidated by spectral analysis (IR, UV, NMR and MS).
Results:
Six compounds were isolated from ethanol extract and their structures were identified as 2,3,4,7-tetramethoxyphenanthrene (I), nakaharain (II), 2,5-dihydroxy-3,4-dimethoxyphenanthrene (III), confusarin (IV), nudol (V) and bulbophyllanthrin (VI).
Conclusion:
Among these compounds, compounds II, III, VI are isolated from Dendrobium candidum for the first time.
