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The percentage yield of lignans from sesame oil was 6.85 % and lignans were composed of a mixture of 2 compounds, which were then purified by column chromatography. These compounds were structurally elucidated as sesamin and sesamolin by nuclear magnetic resonance (NMR) spectroscopy technique. The α-glucosidase and amylase inhibitory activities of sesamin and sesamolin were tested. The results showed that sesamin and sesamolin at 0.5 mg/mL inhibited 80.34±1.22 and 56.76±4.62 % of α-glucosidase activity, respectively, as well as 76.63±1.11 and 43.30±5.76 % of amylase activity, respectively. Therefore, lignans were effective in inhibiting both enzyme activities. This study provided important information on promising compounds for developments of antidiabetic drugs.
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