Phenolic compounds of some alnus species growing in Korea

This study was conducted to compare phenolic constituents in leaves and stem barks of Alnus hirsuta Alnus hirsuta(sex inversed), Alnus hirsuta var. sibirica, Alnus japonica, Alnus borealis, and Alnus maximowicz growing widely in Korea. The above alders were clustered using the Euclidean distance based on the phenolic composition. Eight phenolic compounds were identified in the leaves, while nine phenolic compounds in the stems. Phenolic constituents in leaves were not exactly same as those in stems. Total amount of phenolic compounds was higher in stems than in leaves. Thus, phenolic constituents differed not only among alder species but between organs.