tert-butyl N-allyl-N-(1R)-1-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-3-butenylcarbamate

(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