Study on chemical constituents of coffee husks collected in Gia Lai (Coffea canephora Pierre ex A.Froehner, Rubiaceae)
Main Article Content
Abstract
Coffee husks are the major residues from the processing of coffee that should be reused to bring more financial value and reduce environmental problem. This study is carried out to isolate the components from the coffee husks Coffea canephora P. collected in Gia Lai aiming to use as medicinal material. Preliminary phytochemical survey, extraction, seperation, isolation and purification were done as routine work. Ethanol 50% extract showed strong antioxidant activity in comparison with ethanol 96% and 70% extracts. Five compounds were isolated and their chemical structure were identified as β-sitosterol, ethyl caffeate, caffeine, daucosterol and (+)-catechin basing on spectroscopic methods (NMR, MS) and comparison with literatures. These results are the premise for future studies to evaluate the bioactivities of coffee husks.
Article Details
Keywords
Coffee husk, Coffea canephora, caffein, catechin, antioxidant activity
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