Phenylethanoid and iridoid glycosides from the Thai medicinal plant, Barleria strigosa

Abstract

A phenylethanoid (4-hydroxyphenylethyl 4-O-β-D-glucopyranosyl- (1→3)-O-α-L-rhamnopyranoside) and an iridoid (10-O-trans-coumaroyl- eranthemoside) were isolated from an entire Barleria strigosa plant together with verbascoside, isoverbascoside, decaffeoylverbascoside, (+)-lyoniresinol 3α-O-β-D-glucoside, apigenin 7-O-α-Lrhamnosyl-(1→6)-O- β-D-glucoside, 7-O-acetyl-8-epi-loganic acid and (3R)-1-octen-3-ol-3-O- β-D-xylosyl-(1→6)-β-D-glucoside. The structural elucidations were based on analyses of physical and spectroscopic data. © 2004 Pharmaceutical Society of Japan.