(S)-2-((2S,3R,4S,5R)-2-Benzyloxycarbonylamino-3,4,5,6-tetrahydroxy-hexylamino)-6-tert-butoxycarbonylamino-hexanoic acid methyl ester

(2S,5S)-2-(4-tert-Butoxycarbonylamino-butyl)-3-oxo-5-((1R,2S,3R)-1,2,3,4-tetrahydroxy-butyl)-piperazine-1-carboxylic acid tert-butyl ester