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α-Glucosidase Inhibitory Depsidones from the Lichen Parmotrema tsavoense
Thuc-Huy Duong1,2, Tai-Xuan-Hoa Hang3, Pierre Le Pogam4
1Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
Abstract:
Chemical investigation of the lichen Parmotrema tsavoense led to the isolation of 5 new depsidones, parmosidones F - J (1: - 5: ). These compounds were structurally elucidated using spectroscopic methods including HRESIMS and 2D NMR data. Compounds 1, 3: , and 4: were evaluated for their inhibition of α-glucosidase. All exhibited potent α-glucosidase inhibitory activity with IC50 values ranging from 10.7 to 17.6 µM, which was much lower than that of the positive control acarbose (IC50 449 µM).
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