[Studies on constituents of Dendrobium gratiosissimum].
OBJECTIVE
To study the chemical constituents of Dendrobium gratiosissimum.


METHODS
The constituents were isolated and purified by silica gel, Sephadex LH-20 colum chromatography, and the structures were identified by physicochemical properties and spectral data.


RESULTS
Nine compounds were obtained as: 3,5,4'-trihydroxybibenzyl (1), 3,4'-dihydroxy-5-methoxybibenzyl (2), 3,4-dihydroxy-4', 5-dimethoxybibenzyl (3), apigenin (4), p-hydroxybenzaldehyde (5), defuscin (6), n-octacostyl ferulate (7), beta-sitosterol (8) and daucosterol (9).


CONCLUSIONS
All these compounds were obtained from this plant for the first time, and compounds 2, 4 and 5 were isolated firstly from this genus.
Wang
Min
M
Department of Pharmacognosy, China Pharmaceutical University, Nanjing 210038, China.
Zhang
Chao-feng
CF
Wang
Zheng-tao
ZT
Zhang
Mian
M
D047310:Apigenin / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D001547:Benzaldehydes / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D002109:Caffeic Acids / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D031667:Dendrobium / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
D001547:Benzaldehydes; D002109:Caffeic Acids; C504154:n-octacostyl ferulate; D047310:Apigenin; C011483:4-hydroxybenzaldehyde