[Isolation and characterization of polyphenols in seed of Litchi chinensis].
OBJECTIVE
To study the chemical constituents of polyphenols in seed of Litchi chinensis.


METHODS
The seeds of Litchi chinensis were extracted by 65% ethanol, then the compounds were separated by repeated silica gel, polyamide and preparative TLC. The structures of polyphones isolated were identified by analysis of their spectral datas and chemical properties.


RESULTS
Four polyphones compounds were isolated as protocatechuic aldehyde (I), protocatechuic acid (II), daucosterol (III) and (-) -epicatichin (IV).


CONCLUSIONS
Compounds I , III and IV are isolated from this plant for the first time.
Yan
Ren-Liang
RL
Guangdong Food and Drug Vocational College, Guangzhou 510520, China.
Liu
Zhi-Gang
ZG
D001547:Benzaldehydes / Q000737:chemistry / Q000302:isolation & purification; D002392:Catechin / Q000737:chemistry / Q000302:isolation & purification; D002396:Catechols / Q000737:chemistry / Q000302:isolation & purification; D002855:Chromatography, Thin Layer / Q000379:methods; D000431:Ethanol; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D062385:Hydroxybenzoates / Q000737:chemistry / Q000302:isolation & purification; D032125:Litchi / Q000737:chemistry*; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry* / Q000302:isolation & purification; D059808:Polyphenols; D012639:Seeds / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry* / Q000302:isolation & purification
D001547:Benzaldehydes; D002396:Catechols; D005419:Flavonoids; D062385:Hydroxybenzoates; D010636:Phenols; D059808:Polyphenols; D012855:Sitosterols; C009091:protocatechuic acid; D000431:Ethanol; C005581:protocatechualdehyde; D002392:Catechin; C011015:lyoniside