(2S,3S)-2-(3-Chloro-propyl)-3-methyl-4-oxo-3,4-dihydro-2H-pyridine-1-carboxylic acid benzyl ester

(2S,3S,6R)-6-(4-Benzyloxy-butyl)-2-(3-chloro-propyl)-3-methyl-4-oxo-piperidine-1-carboxylic acid benzyl ester

(2S,3S,6R)-6-(4-Benzyloxy-butyl)-2-(3-chloro-propyl)-3-methyl-4-trifluoromethanesulfonyloxy-3,6-dihydro-2H-pyridine-1-carboxylic acid benzyl ester