(2R,3S)-3-Methyl-1-[4-(2-methyl-benzyloxy)-benzenesulfonyl]-piperazine-2-carboxylic acid tert-butyl ester

(2R,3R)-2-Azido-3-benzyloxycarbonylamino-butyric acid tert-butyl ester

(2R,3S)-3-Azido-2-benzyloxycarbonylamino-butyric acid tert-butyl ester

(2R,3R)-1-[4-(Isoquinolin-4-ylmethoxy)-benzenesulfonyl]-3-methyl-aziridine-2-carboxylic acid tert-butyl ester

(1S,2R)-2-(N-Benzyloxycarbonyl-N-methyl)amino-1-(tert-butoxycarbonyl)propyl-1-methanesulfonate