Separation of antioxidant and α-glucosidase inhibitory flavonoids from the aerial parts of Asterothamnus centrali-asiaticus
Natural Product Research
Format: Journal Article
Publication Year: 2017
Pages: 1365 - 1369
Source ID: shanti-sources-95256
Collection: Himalayan and Tibetan Medicine
Abstract: A new flavonoid, along with 16 known ones, was separated from the aerial parts of Asterothamnus centrali-asiaticus. Their structures were elucidated by extensive spectroscopic methods, including 1D and 2D NMR techniques and HRESIMS. To confirm the structure of the new compound, computational prediction of its 13C chemical shifts was performed. All of the 17 flavonoids were reported from A. centrali-asiaticus for the first time. In addition, all flavonoids were evaluated for their antioxidant and α-glucosidase inhibitory activities. The results showed that 10 of them exhibited antioxidant activity. Meanwhile, four flavonoids displayed α-glucosidase inhibitory effect with IC50 values ranging from 38.9 to 299.7 μM.