(2S,3S,6R)-3-Benzyloxy-6-(2-hydroxy-ethyl)-2-methyl-piperidine-1-carboxylic acid methyl ester

(2S,3S,6S)-6-Methoxycarbonylmethyl-3-methoxymethoxy-2-methyl-piperidine-1-carboxylic acid methyl ester

(2S,3S,6R)-3-Benzyloxy-6-methoxycarbonylmethyl-2-methyl-piperidine-1-carboxylic acid methyl ester

Acetic acid (2S,3R)-2-acetoxymethyl-1-benzyl-6-oxo-piperidin-3-yl ester

[(5R,6S)-5-Acetoxy-6-acetoxymethyl-1-benzyl-piperidin-(2E)-ylidene]-acetic acid methyl ester