An unusual new sulfated triterpene saponin from Arenaria juncea.

A novel triterpene saponin, 3-Osulfate-gypsogenic acid-23-O-beta-D-4-O-sulfate-glucopyranoside (junceoside D), has been isolated from the roots of Arenaria juncea. The structure was characterized mainly by a combination of 2D-NMR techniques, mass spectrometry and chemical methods.