Ferulic acid esters of oligo-glucose from Allium macrostemon

Abstract

Two new ferulic acid esters of oligo-glucose, 1-O-(E)-feruloyl-β-D-gentiobioside (1) and 1-O-(E)-feruloyl-{-β-D-glucopyranosyl (1→6)-[-β-D-glucopyranosyl (1→2)]}-β-D-glucopyranoside (allimacronoid D, 2) were isolated together with 1-O-(E)-feruloyl-β-D-glucopyranoside (3) and trans-ferulic acid (4) from the leaves of Allium macrostemon Bunge. The chemical structures were elucidated based on the analyses of the spectroscopic and chemical data.