Vaccaroid A, a new triterpenoid saponin with contractility of rat uterine from Vaccaria segetalis

Vaccaroid A, a new triterpenoid saponin, showing uterine contraction, has been isolated from the seeds of Vaccaria segetalis and its structure was elucidated to be 3β-hydroxyolean-12-en-23, 28-dioic acid-28-O-β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→6)-[β-D-glucopyranosyl-(1→2)]-β-D-glucopyranoside by using a combination of extensive 2D NMR techniques.