Four new estersaponins were isolated from hacquetia epipactis. Using GC-MS, FAB-MS and various 2D-NMR techniques they were identified as 3-O-[beta-D-glucopyranosyl-(1-->2)-[alpha-L-arabinopyranosyl-(1--> 3)]- beta-D-glucuronopyranosyl-(1-->)]-21-acetyl-22-(2-methylbutyryl)- barringtogenol C