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(2017/12/29)(S)-2-{1-[(tert-butoxy)carbonyl]piperidin-2-yl}acetic acid
(R)-tert-butyl 2-(2-ethoxy-2-oxoethyl)piperidine-1-carboxylate
tert-butyl 2-(2-ethoxy-2-oxoethyl)piperidine-1-carboxylate
ethyl 2-(pyridinyl-2)acetate
2-ethoxycarbonylmethylpiperidine