4-((5R,8R,8aS)-8-Methyl-octahydro-indolizin-5-yl)-butyraldehyde

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

(S)-2-(3-Hydroxy-propyl)-2,3-dihydro-1H-pyridin-4-one

(S)-2-(tert-Butyl-diphenyl-silanyloxymethyl)-6-oxo-piperidine-1-carboxylic acid benzyl ester

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

(S)-2-(3-Hydroxy-propyl)-4-oxo-5-triisopropylsilanyl-3,4-dihydro-2H-pyridine-1-carboxylic acid (1S,2R)-2-(1-methyl-1-phenyl-ethyl)-cyclohexyl ester

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

1-phenylmethyl 2-methyl 6-(tert-butyldiphenylsilyloxymethyl)-5,6-dihydro-4H-pyridine-1,2-dicarboxylate

(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

phenylmethyl 2-(tert-butyldiphenylsilyloxymethyl)-6-trifluoromethanesulfonyloxy-3,4-dihydro-2H-pyridine-1-carboxylate

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

phenylmethyl 6-(tert-butyldiphenylsilyloxymethyl)-2-hydroxymethyl-3-methylpiperidine-1-carboxylate

1-phenylmethyl 2-methyl 6-(tert-butyldiphenylsilyloxymethyl)-3-methylpiperidine-1,2-dicarboxylate