THE FORMATION, SEPARATION, AND STRUCTURAL ELUCIDATION OF THE SECONDARY SAPOGENINS OF GYPENOSIDES

Authors
MA JB ZHAO CX FAN YG HE BL
Citation
Jb. Ma et al., THE FORMATION, SEPARATION, AND STRUCTURAL ELUCIDATION OF THE SECONDARY SAPOGENINS OF GYPENOSIDES, Huaxue xuebao, 51(7), 1993, pp. 708-712
Citations number
1
Categorie Soggetti
Chemistry
Journal title
Huaxue xuebao → ACNP
ISSN journal
05677351
Volume
51
Issue
7
Year of publication
1993
Pages
708 - 712
Database
ISI
SICI code
0567-7351(1993)51:7<708:TFSASE>2.0.ZU;2-U
Abstract
Gypenosides,a series of dammarane-type saponins from Gynostemma Pentap hyllum (Thunb. ) Makino, were hydrolyzed with 5% sulfuric acid to affo rd a new secondary sapogenin (20R, 25S)-12beta, 25-epoxy-20, 26-cyclod ammarane-2alpha, 3beta-diol in addition to the known panaxadiol, 2alph a-hydroxypanaxadiol, and (20R, 25S)-12beta, 25-epoxy-20, 26-cyclodamar an-3beta-ol reported previously. The molecular structure of the new se condary sapogenin was elucidated by means of spectroscopic methods and X-ray crystallographic analysis.