A phytochemical study was carried out on Ajuga multiflora, and obtained a novel ursane-type triterpene saponin, i.e., 3-epi-ursolic acid 3-O-palmitoyl 28-O-α-L-arabinofuranosyl ester (1), named ajugoside. Its structure and relative configuration were identified mainly by spectroscopic methods including 1D- and 2D-NMR techniques as well as HR-MS analysis. This paper described the isolation and structural elucidation of ajugoside (1) for the first time.
Keywords: Ajuga multiflora; secondary motabolites; triterpene saponin; ursane-type.