for the following products
1-Piperidinecarboxylicacid, 3-(2-hydroxyethyl)-1,1-dimethylethyl ester | 3-(2-Hydroxyethyl)piperidine-1-carboxylic acid tert-butyl ester | tert-Butyl 3-(2-hydroxyethyl)piperidine-1-carboxylate and 1-N-Boc-Piperidine-3-ethanol
