(E)-(7-tert-butoxycarbonylamino)-2-heptenal

(R)-tert-butyl 2-[(R)-1-(methoxycarbonyl)-4-hydroxybutyl]piperidine-1-carboxylate

(R)-2-methoxycarbonylmethylpiperidine-1-carboxylic acid tert-butyl ester

(R)-1-Boc-2-哌啶乙酸

(R)-2-(2-oxo-ethyl)-piperidine-1-carboxylic acid tert-butyl ester