Résumé
Panax japonicus( PJ) is a valuable medicinal plant belonging to the genus Panax of Araliaceae,the recumbent rhizome of which is widely used in clinic therapy,healthcare products and as cosmetic additives with functions of dissipating stasis,reducing swelling,stanching bleeding,and reinforcing deficiency,etc. PJ contains abundant levels of oleanane-and dammarane-type triterpene saponins,which are considered as the material basis for exerting pharmacodynamic action. Based on the previous researches,more than110 triterpene saponins have been reported from PJ. These triterpene saponins were summarized in this review,and could be classified into dammarenediol Ⅱ,protopanaxadiol,protopanaxatiol,ocotillol,oleanolic acid,ursolic acid and miscellaneous subtypes,according to their molecular skeletons in biosynthesis processes. Further more,the structural features of these triterpene saponins in the seven different subtypes,together with their~(13)C-NMR spectroscopic characteristics were described,hoping to provide available information for chemical diversity research of PJ.
Sujets)
Spectroscopie par résonance magnétique , Panax , Chimie , Plantes médicinales , Chimie , Saponines , Chimie , Triterpènes , ChimieRésumé
Phytochemical investigations on bark of trunks and leaves of Diospyros soubreana (Ebenaceae) led to the isolation and characterisation of nine molecules: one monocyclic sesquiterpenoid lactone (1), five pentacyclic triterpenes (2, 3, 4, 5 and 6), two sterols (7 and 8) and one carotenoid alcohol (9), all isolated for the first time from this species. The structural elucidation of these compounds was carried out by 13C NMR spectroscopy.