[Studies on phenanthrene constituents from stems of Dendrobium candidum].
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).


CONCLUSIONS
Among these compounds, compounds II, III, VI are isolated from Dendrobium candidum for the first time.
Li
Rong-sheng
RS
Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
Yang
Xin
X
He
Ping
P
Gan
Ning
N
D002855:Chromatography, Thin Layer; D031667:Dendrobium / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D015394:Molecular Structure; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
D010616:Phenanthrenes