1-N-(4-Guanidino-2-hydroxybutyryl)kanamycin 136345-19-2 D-Streptamine, O-3-amino-3-deoxy-alpha-D-glucopyranosyl-(1-6)-O-(6-amino-6-deoxy-alpha-D-glucopyranosyl-(1-4))-N1-(4-((aminoiminomethyl)amino)-2-hydroxy-1-oxobutyl)-2-deoxy-, (S)-, sulfate (1:2) (salt)