(1R,2R,4S)-7-azabicyclo[2.2.1]heptan-2-yl hydrogen sulfate

(1R,2S,4S)-2-((S)-3,3,3-Trifluoro-2-methoxy-2-phenyl-propionyloxy)-7-aza-bicyclo[2.2.1]heptane-7-carboxylic acid tert-butyl ester

methyl (1R,2R,4S)-N-(tert-butoxycarbonyl)-2-hydroxy-7-azabicyclo[2.2.1]heptane-1-carboxylate

(1R,4S)-N-(tert-butoxycarbonyl)-7-azabicyclo[2.2.1]heptan-2-one-1-carboxylic acid