Five new compounds from Dendrobium longicornu.
A novel bibenzyl, a new bibenzyl, two new phenanthrenes, and a new lignin glycoside, namely longicornuol A (1), 4-[2-(3-hdroxyphenol)-1-methoxyethyl]-2,6-dimethoxyphenol (2), 5-hydroxy-7-methoxy-9,10-dihydrophenanthrene-1,4-dione (3), 7-methoxy-9,10-dihydrophenanthrene-2,4,5-triol (4) and erythro-1-(4-O-beta-D-glucopyranosyl-3-methoxyphenyl)-2-[4-(3-hydroxypropyl)-2,6-dimethoxyphenoxy]-1,3-propanediol ( 5), together with 14 known compounds, were isolated from the stems of Dendrobium longicornu. All structures were elucidated by spectroscopic methods (NMR, MS, UV and IR). Anti-platelet aggregation activities of compounds 1 - 5 were also tested.
State Key Laboratory of Phytochemistry and Plant Resource in West China, Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming, P. R. China.
Jiang-Miao
JM
Hu
Ji-Jun
JJ
Chen
Hong
H
Yu
You-Xing
YX
Zhao
Jun
J
Zhou
D001632:Bibenzyls / Q000737:chemistry / Q000302:isolation & purification*; D031667:Dendrobium / Q000737:chemistry*; D008031:Lignin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D015394:Molecular Structure; D010616:Phenanthrenes / Q000737:chemistry / Q000302:isolation & purification*; D010975:Platelet Aggregation Inhibitors / Q000302:isolation & purification*
D001632:Bibenzyls; D010616:Phenanthrenes; D010975:Platelet Aggregation Inhibitors; C530766:longicornuol A; D008031:Lignin