D-Streptamine, O-2- amino-2-deoxy-alpha-D-glucopyranosyl-(1-4)-O-(O-2,6-diamino-2,6-dideoxy-beta-L-idopyranosyl-(1-6)-beta-D-ribofuranosyl-(1-5))-2-deoxy-, N-((5-(dimethylamino)-1-naphthalenyl)sulfonyl) deriv.