[Studies on chemical constituents in stem of Dendrobium chrysotoxum].
OBJECTIVE
To investigate the chemical constituents of Dendrobium chrysotoxum.


METHODS
The chemical constituents were isolated by various column chromatographic methods and structurally elucidated by spectral evidences.


RESULTS
Ten compounds were obtained and identified as (+)-syringare sinol (1), 5alpha, 8alpha-epidioxy-24( R)-methycholesta-6, 22-dien-3beta-ol (2), trans-3-(4-hydroxy-3-methoxyphenyl)-acrylic acid octacosyl ester (3), defusin (4), 3, 4-dihydroxy benzoic acid (5), 3, 4-dimethoxy-benzoic acid (6), vanillic acid (7), 3, 4-dimethoxy-benzoic acid methyl ester (8), 3, 5-dibromo-2-aminobenzaldehyde (9), heptadecanoic acid 2, 3-dihydroxy-propyl ester (10).


CONCLUSIONS
Compounds 1, 2 and 6-10 were isolated from this plant for the first time.
Gong
Yan-Qing
YQ
China Pharmaceutical University, Nanjing 210038, China.
Yang
Hong
H
Liu
Yun
Y
Liang
Ai-Qun
AQ
Wang
Zheng-Tao
ZT
Xu
Luo-Shan
LS
Hu
Zhi-Bi
ZB
D031667:Dendrobium / Q000737:chemistry*; D005663:Furans / Q000737:chemistry / Q000302:isolation & purification*; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014641:Vanillic Acid / Q000737:chemistry / Q000302:isolation & purification*
D005663:Furans; D017705:Lignans; C042192:syringaresinol; D014641:Vanillic Acid