Constituents of Fermented Male Flowers of Alnus sieboldiana (Betulaceae)

Abstract

Fractionation of the ethyl acetate crude extract of the fermented male flowers of Alnus sieboldiana resulted in the isolation of two diaryiheptanoids and six flavonoids. Yashabushidiol A, yashabushidiol B and naringenin were known constituents of the male flowers of A. sieboldiana while kaenipferol, quercetin, pinocembrin dimethyl ether, 5,7-dimethoxy-3-hydroxyflavanone and 5,7-dimethoxy-3-hydroxyflavone were isolated for first time from the fermented mile flowers of A. sieboldiana. The isolated compounds were characterized using NMR and HRMS and compared with available literature. -.