(3R,5S)-3-Acetoxymethyl-5-hydroxymethyl-piperidine-1-carboxylic acid benzyl ester
(3S,5R)-(+)-3-acetoxymethyl-5-formyl-1-piperidine-1-carbvoxylic acid benzyl ester
(3S,5R)-3-acetoxymethyl-5-hydroxymethylpiperidine-1-carboxylic acid benzyl ester
(3S,5R)-3,5-Bis-acetoxymethyl-piperidine-1-carboxylic acid benzyl ester