[Studies on the chemical constituents from Rhododendron delavayi].
OBJECTIVE
To study the chemical constituents of the leaves from Rhododendron delavayi.


METHODS
The compounds were isolated and purified using column chromatography with silical gel and Sephadex LH-20, and their structures wer identified by their physical and spectral data.


RESULTS
Eight compounds were isolated and elucidated as 3',4',7-trihydroxy-3,5-dimethoxyflavone (1), 3',4',5,7-tetrahydroxy-3-methoxyflavone(2), quercetin-3-O-beta-D-arabinopyranoxide(3), catechin(4), epicatechin (5), epicatechin-(2beta-->O-->7,4beta-->8)-ent-epicatechin(6), (2S)-4-(3,4-dihydroxyphenyl) -2-butanol(7), (3,4-dihydroxyphenyl)-2-ethanol(8).


CONCLUSIONS
Compounds 2,3,6,7,8 are isolated from this plant for the first time.
Song
He-jiao
HJ
The college of Life Science and Technology, Kunming University of Science and Technology, Kunming 650224, China.
Pan
Yu-yin
YY
Wang
Wei-guang
WG
Fu
Li-zhuo
LZ
Li
Hai-zhou
HZ
Li
Hong-mei
HM
Li
Rong-tao
RT
D002392:Catechin / Q000737:chemistry / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010626:Phenylethyl Alcohol / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D029793:Rhododendron / Q000737:chemistry*
D044948:Flavonols; C047368:3-methylquercetin; C005975:3,4-dihydroxyphenylethanol; D002392:Catechin; D011794:Quercetin; D010626:Phenylethyl Alcohol