D-Streptamine, O-2-amino- 2,3,4,6-tetradeoxy-3-(methylamino)-alpha-D-erythro-hexopyranosyl-(1-4)-O-(3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranosyl-(1-6))-N1-(4-amino-2-hydroxy-1-oxobutyl)-2-deoxy-, (S)-