Erigeroflavanone, a Flavanone Derivative from the Flowers of Erigeron annuus with Protein Glycation and Aldose Reductase Inhibitory Activity

A novel 2,3-dioxygenated flavanone, erigeroflavanone (1), as well as eight known flavonoids and two known γ-pyranone derivatives, were isolated from an ethyl acetate-soluble extract of the flowers of Erigeron annuus. The structure of compound 1 was elucidated by interpretation of spectroscopic data. All of the isolates were subjected to in vitro bioassays to evaluate their inhibitory activity against advanced glycation end products formation and...