Elucidation of anα-glucosidase inhibitor from the peel of Allium cepa by principal component analysis.
Biosci Biotechnol Biochem. 2019 Apr ;83(4):751-754. Epub 2019 Jan 8. PMID: 30621512
We conducted liquid chromatography-mass spectrometry measurements on hot-water extracts of peel from different varieties of Allium cepa. Some quercetin glycosides were identified as potentialα-glucosidase inhibitors by principal component analysis of the liquid chromatography-mass spectrometry data. α-Glucosidase inhibitory activity assays identified quercetin-4'-O-glucoside as an α-glucosidase inhibitor.