Antioxidant and Tyrosinase-Inhibitory Activities and Biological Bioactivities of Flavonoid Derivatives from Pollen.

Flavonoids, present in plants as enriched secondary metabolites, prevent various stresses such as temperature fluctuations, acidity, and insect predation, are commonly found in leaves, stems, and flowers, and serve as important bioactive components. In this study, a total of eighteen different flavonoids, including one newly identified flavonoid glycoside, were successfully isolated from the pollen of . The structure of the novel compound was determined using nuclear magnetic resonance, mass spectrometry, and infrared spectroscopy.