.alpha.-D-gluco-Hexodialdo-1,5-pyranoside, 3-deoxy-1-C-(diaminomethoxy)-3-(2-hydroxyethyl)(hydroxymethyl)amino-1-O-methyl-.beta.-D-fructofuranosyl 2-deoxy-2-(2-hydroxyethyl)(hydroxymethyl)amino-, diaminomethyl methyl acetal