[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.