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[Isolation and characterization of polyphenols in seed of Litchi chinensis]
1Guangdong Food and Drug Vocational College, Guangzhou 510520, China.
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.
