Recent investigations on the structure of streptorn: ycin have shown that it is composed of a base, streptidine, CaHlg04N6 (1), 11334, 5 linked glycosidically, to streptobiosamine, a nitrogencontaining bisa. ccharide of the formula C13H21-23-OgN (II). 3 The glycosidic linkage between these two moieties is easily cleaved by hydrogen chloride in methanol with the formation of streptidine hydrochloride and methyl streptobiosaminide dimethyl acetal. ...