Flavonol Glycosides from the Wood of Platycarya strobilacea

This study was carried out to investigate the constituents of Platycarya strobilacea (Juglandaceae) wood. To isolate compounds, wood was extracted with ethanol (EtOH) and then partitioned with petroleum ether, diethyl ether (Et₂O) and ethyl acetate (EtOAc) successively. After partitioned, diethyl ether fraction was subjected to column chromatography with various solvent system in silica gel and/or Sephadex LH-20. Structures were elucidated by spectroscopic methods including MS, ¹H, ¹³C and 2D-NMR experiments. Three compounds were isolated from the wood and identified as kaempferol 3-O-𝛼-L-rhamnopyranoside (afzelin, I), quercetin 3-O-𝛼-L-rhamnopyranoside (quercitrin, II), myricetin 3-O-𝛼-L-rhamnopyranoside (myricitrin, III).