ethyl 2-[1-[(2-methylpropan-2-yl)oxycarbonyl]piperidin-4-yl]-4,5-dihydro-1,3-thiazole-4-carboxylate

tert-butyl 4-[cyano(hydroxy)methyl]piperidine-1-carboxylate

tert-butyl 4-(2-cyano-1-hydroxyethyl)piperidine-1-carboxylate

2-甲基-2-丙基4-(2-环氧乙烷基)-1-哌啶羧酸酯

tert-butyl 4-[(3-fluoro-4-morpholin-4-ylanilino)methyl]piperidine-1-carboxylate