(1s,2s,3r,4s,6r)-4,6-diamino-3-({(5r)-2-amino-2-deoxy-5-[(1s)-1-hydroxyethyl]-alpha-d-xylopyranosyl}oxy)-2-hydroxycyclohexyl 3-deoxy-4-c-methyl-3-(methylamino)-beta-l-arabinopyranoside