Three phloridzin derivatives capable of anti-oxidant from <i>Malus toringoides</i> (Rehd) Hughes

Two new phloridzin derivatives 6″-<i>O</i>-(4-hydroxytrans cinnamoyl) phloridzin (1) and 6″-<i>O</i>-(4-hydroxycis-cinnamoyl) phloridzin (3) and one known dihydrochalcones 6″-<i>O</i>-feruloyl phloroside (2) were isolated from the leaves of <i>Malus toringoides</i> (Rehd) Hughes. Their structures were elucidated on the basis of extensive spectroscopic data. The results of zebrafish and FRAP antioxidant kit showed that compound 1–3 had antioxidant effects.