(6S,7R)-7-Benzyloxymethyl-6-hydroxy-4-methyl-[1,4]diazepan-2-one

[((2S,3R)-3-Amino-4-benzyloxy-2-hydroxy-butyl)-methyl-amino]-acetic acid

(6S,7R)-7-Benzyloxymethyl-6-(tert-butyl-diphenyl-silanyloxy)-4-methyl-[1,4]diazepan-2-one

Toluene-4-sulfonic acid (2R,3R)-3-azido-4-benzyloxy-2-(tert-butyl-dimethyl-silanyloxy)-butyl ester

(2R,3R)-3-azido-2,4-bis(benzyloxy)butanal