抄録
Pollen grains of Alnus japonica STEUD. were treated with supersonic waves in an organic solvent, their chemical components were examined, and the following compounds, hydrocarbons, lupenone, and β-sitosterol were identified. As water-soluble components, seventeen amino acids, malonic acid, glucose, and mannose were identified. From the acetone extracts, a new flavone glucoside ; quercetin 3-β-D-glucopyranosyl-4-O-α-D-glucopyranoside (1), was isolated and its structure was elucidated from chemical evidences and spectroscopic data.
