Summary. The first partial syntheses of galactosyl-glucosyl oleanolic acid disaccharides are described. Arvensoside B and calenduloside A, which have earlier been isolated from Calendula arvensis and Calendula officinalis, and some further oleanolic acid glycosides were prepared from differently linked acetobromo sugars. The hemolytic properties of these saponins were investigated. Systematic variation of the carbohydrate structure and ...
