New triterpene saponins from the root of Ilex pubescens

Two new triterpene glycosides named ilexpublesnin A (1) and ilexpublesnin B (2) were isolated from the root of Ilex pubescens. Their structures were determined as 3-O-(β-d-xylopyranosyl)-28-O-(β-d-glucopyranosyl)-3β, 19α-dihydroxyurs-23-oxo-12-en-28-oic acid (1) and 28-O-(β-d-xylopyranosyl-(2 → 1)-β-d-glucopyranosyl)-3β, 19α-dihydroxyurs-23-oxo-12-en-28-oic acid (2) on the basis of chemical and spectroscopic methods.

Graphical abstractTwo new triterpene glycosides ilexpublesnin A (1) and ilexpublesnin B (2) were isolated from the root of Ilex pubescens, and their structures were elucidated on the basis of chemical and spectroscopic methods.Figure optionsDownload full-size imageDownload as PowerPoint slide