(3R,4S,5R)-4-acetylamino-3-(1-ethyl-propoxy)-5-methanesulfonyloxy-cyclohex-1-enecarboxylic acid ethyl ester

ethyl (3R,4R,5S)-4-(acetylamino)-5-azido-3-hydroxycyclohex-1-ene-1-carboxylate

3-pentyl trichloroacetimidate

(3R,4R,5S)-ethyl 5-azido-4-((tert-butoxycarbonyl)amino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

乙酸酐