11001-13-1 13291-74-2 3947-40-8 D-Streptamine, O-2-amino-2-deoxy-alpha-D-glucopyranosyl-(1-4)-O-(3-deoxy-3-(methylamino)-alpha-D-xylopyranosyl-(1-6))-2-deoxy- Gentamicin A Gentamycin A