36889-15-3 36889-16-4 BRN 1669189 D-Streptamine, O-6-amino-6,7-dideoxy-D-glycero-alpha-D-gluco-heptopyranosyl-(1-4)-O-(3-deoxy-4-C-methyl-3-(methylamino)-beta-L-arabinopyranosyl-(1-6))-2-deoxy- Gentamicin B1 Gentamycin B1