Flavonoids from the flowers and leaves of Kerria japonica (Rosaceae)

抄録

Eight flavonoids were isolated from the flowers of Kerria japonica and identified as kaempferol 3-O-rutinoside (1) and 3-O-robinobioside (2), quercetin 3-O-glucoside (3) and 3-O-galactoside (4), and isorhamnetin 3-O-glucoside (5), 3-O-galactoside (6), 3-O-rutinoside (7) and 3-O-robinobioside (8) by UV, LC-MS, acid hydrolysis, and HPLC and TLC comparisons with authentic samples. On the other hand, five flavonoids were isolated from the leaves of the species. Of these flavonoids, two were identified as pectolinarigenin 7-O-rutinoside (9) and vicenin-2 (13). Although other three flavonoids were characterized as pectolinarigenin 7-O-(acetylrutinosides) by UV, LC-MS, acid hydrolysis, and the comparison with chemical data of the literature.