CHLOROGENIC ACIDS FROM GREEN COFFEE BEANS COLLECTED IN TAY NGUYEN PROVINES OF VIETNAM
Keywords:chlorogenic acids, green coffee beans.
Six chlorogenic acid compounds, including 5-O-Caffeoyquinic acid (1), 3-O-Caffeoyquinic acid (2), 4-O-Caffeoyquinic acid (3), 3,5-O-Dicaffeoylquinic acid (4), 3,4-O-Dicaffeoylquinic acid (5) and 4,5-O-Dicaffeoylquinic acid (6) were isolated from the methanol extract of green coffee beans collected in Gia Lai, Kon tum, Tay Nguyen provinces of Vietnam. Their structures were determined by ESI-MS, 1D and 2D NMR spectra and by comparison with the reported spectral data. This is the first report on the isolation of chlorogenic acid compounds from green coffee beans of Vietnam. 3-O-Caffeoyquinic acid was isolated as the main component with extraction efficiency of 0.58 % compared to dried material weight.
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