Communications to the Editor 2121 Acid hydrolysis of II followed by acetylation and chromatographic separation4 yields N-methyl--L-glucosamine pentaacetate, [a] 29d -99 ± 2°( c 1, chloroform), m. p. 158°, unchanged on admixture with an authentic synthetic specimen. These data demonstrate that in streptomycin, the carbonyl group of N-methyl-L-glucosamine is glycosidically joined to the central portion, which is in turn similarly linked to streptidine.
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