α-Glucosidase Inhibitors from Preussia minimoides ‡
- PMID: 27673367
- DOI: 10.1021/acs.jnatprod.6b00574
α-Glucosidase Inhibitors from Preussia minimoides ‡
Abstract
Extensive fractionation of an extract from the grain-based culture of the endophytic fungus Preussia minimoides led to the isolation of two new polyketides with novel skeletons, minimoidiones A (1) and B (2), along with the known compounds preussochromone C (3), corymbiferone (4), and 5-hydroxy-2,7-dimethoxy-8-methylnaphthoquinone (5). The structures of 1 and 2 were elucidated using 1D and 2D NMR data analysis, along with DFT calculations of 1H NMR chemical shifts. The absolute configuration of 1 was established by a single-crystal X-ray diffraction analysis and TDDFT-ECD calculations. Compounds 1-4 significantly inhibited yeast α-glucosidase.
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