4-benzenesulfinylmethyl-4-hydroxy-piperidine-1-carboxylic acid tert-butyl ester

4-(3-methoxy-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester

tert-butyl 4-(benzofuran-2-yl)-3,6-dihydropyridine-1(2H)-carboxylate