(3S,4R,5R)-ethyl 4-azido-3-(tert-butoxycarbonylamino)-5-hydroxy-1-(phenylselanyl)cyclohexanecarboxylate

(1S,3S,4R,5R)-ethyl 4-azido-3-(tert-butoxycarbonylamino)-5-(trimethylsilyloxy)cyclohexanecarboxylate