(2R,3R,4R,5R)-N-butyl-2-(acetamidomethyl)-3,4-bis(benzyloxy)-5-<(benzyloxy)methyl>pyrrolidine

(1'R,2R,3R,4R,5R)-N-butyloxycarbonyl-2-<2-amino-1-(benzyloxy)ethyl>-3,4-bis(benzyloxy)-5-<(benzyloxy)methyl>pyrrolidine

(2R,3R,4R,5R)-3,4-bis(benzyloxy)-5-<(benzyloxy)methyl>pyrrolidino<1,2-c>oxazole-3-one

(2R,3R,4R,5R)-N-butyloxycarbonyl-2-(azidomethyl)-3,4-bis(benzyloxy)-5-<(benzyloxy)methyl>pyrrolidine

(2R,3R,4R,5R)-3,4-Bis-benzyloxy-2-benzyloxymethyl-5-methanesulfonyloxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester