[2-[4-amino-3,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-5-carbamoylox y-4-[5-[6-(1,2-dihydroxyethyl)-3,4,5-trihydroxy-oxan-2-yl]oxy-4-hydrox y-3-methylamino-oxan-2-yl]oxy-3,6-dihydroxy-cyclohexyl] carbamate