Studies on the Constituents of Compositae Plants. Part II. Oleanane Glycosides from Eclipta alba.
摘要:
From the whole parts of Eclipta alba HASSK., six new oleanane triterpene glycosides, named eclalbasaponins I-VI (1-6), were isolated. The structures of 1-6 were characterized as echinocystic acid glycosides, and of those, 5 and 6 were revealed to be sulfated saponins on the basis of chemical and spectral data.
Abstract Prosapogenin was obtained by alkaline hydrolysis of Gleditsiasaponin GS-C (echinoeystic acid 3, 28-O-bisdesmoside), a new triterpenoid saponin isolated fromGleditsia japoinica. Prosapogenin was shown on the basis of chemical and physicochemical data to be echinocystic acid 3-O-β- d -xylopyranosyl-(1–2)-α- l -arabinopyranosyl-(1–6)-β- d -glucopyranoside.
Studies on the Constituents of Compositae Plants. Part II. Oleanane Glycosides from Eclipta alba.
作者:Shoji YAHARA、Ning DING、Toshihiro NOHARA
DOI:10.1248/cpb.42.1336
日期:——
From the whole parts of Eclipta alba HASSK., six new oleanane triterpene glycosides, named eclalbasaponins I-VI (1-6), were isolated. The structures of 1-6 were characterized as echinocystic acid glycosides, and of those, 5 and 6 were revealed to be sulfated saponins on the basis of chemical and spectral data.