RESUMEN
A new ellagic acid derivative, 3,3'-dimethylellagic acid-4'-O-(6â³-galloyl)-ß-D-glucoside, named runcinatside (5), together with four known compounds 3,3'-dimethylellagic acid (1), 3,3',4'-trimethylellagic acid (2), 3,3'-dimethylellagic acid-4'-O-ß-D-glucoside (3) and 3-methylellagic acid-4'-O-α-L-rhamno-pyranoside (4), was isolated from the roots of Polygonum runcinatum Buch.-Ham. ex D.Don Var. sinense Hemsl and the structures of these compounds were established by spectroscopic methods and comparison with previously reported data. All compounds showed antioxidant activities in vitro and compound 5 possessed the highest activity.
Asunto(s)
Antioxidantes/química , Ácido Elágico/análogos & derivados , Raíces de Plantas/química , Polygonaceae/química , Ácido Elágico/química , Ácido Elágico/aislamiento & purificación , Glucósidos/química , Glucósidos/aislamiento & purificación , Concentración 50 Inhibidora , Estructura MolecularRESUMEN
Taxadiene (3), a new taxane diterpenoid with an unusual hydroxy substituting at C-17, and six known compounds including two taxane diterpenoids (1 and 2) and four flavonoids (4-7) were isolated from the whole seedling of the Taxus chinensis var. mairei. Among them, compound 7 was isolated from T. chinensis var. mairei for the first time. Structures of these compounds were elucidated on the basis of spectroscopic data and by comparison with reported literature data.