Isolation and identification of phenolic compounds from an Asian pear (Pyrus pyrifolia Nakai) fruit peel

Eight phenolic compounds were isolated from the EtOAc-soluble acidic layer of methanol extracts of Asian pear (Pyrus pyrifolia Nakai cv. Chuhwangbae) fruit peels. These isolated compounds were identified to be arbutin (1), 4-(O-β-d-glucopyranosyl)-3-(3′-methyl-2′-butenyl)benzoic acid (2, malaxinic acid), 3,4-dihydroxybenzoic acid (3), trans-chlorogenic acid (4), cis-chlorogenic acid (5), isorhamnetin 3-O-β-d-glucopyranoside (6),...