Two novel triterpene saponins, named desacylmasonosides 4 and 5, and a new oxygenated fatty acid have been isolated, together with a known saponin, desacylcrocosmioside A, from the weak alkaline hydrolysate of the crude saponin obtained from the corms of Crocosmia masoniorum. On the basis of
Three novel triterpenoid saponins, named masonosides A-C, were isolated from the corms of Crocosmia masoniorum. On the basis of spectral and chemical evidence, the structures of masonosides A-C were elucidated as 3-O-[alpha-L-arabinopyranosyl-(1-->6)-beta-D-glucopyranosyl]-28-O- (2-O-