(R)-tert-butyl 6-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)-5,6-dihydropyridine-1(2H)-carboxylate

(R)-tert-butyl 2-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)piperidine-1-carboxylate

tert-butyl 1-(R)-2-((S)-1,2-dihydroxylethyl)piperidine-1-carboxylate

(R,E)-tert-butyl 2-(3-ethoxy-3-oxoprop-1-enyl)piperidine-1-carboxylate

(R)-2-甲酰基-1-哌啶甲酸叔丁酯