A new phenylethanoid glucoside from Plantago depressa Willd.

Chemical research of Plantago depressa Willd. led to one new phenylethanoid glucoside with α-L-rhamnosyl (1 → 2)-β-D-glucose structure, together with four known compounds. These five compounds (1-5) were isolated from the family Plantaginaceae for the first time; the chemotaxonomic significance of cerebrosides was also discussed.